[1] : The Collaborative International Dictionary of English v.0.48

sidereal \side"real\, a. l. sidereus, from sidus, sideris, a
   constellation, a star. cf. sideral, consider, desire.
   1. relating to the stars; starry; astral; as, sidereal
      astronomy.
      1913 webster

   2. astron. measuring by the apparent motion of the stars;
      designated, marked out, or accompanied, by a return to the
      same position in respect to the stars; as, the sidereal
      revolution of a planet; a sidereal day.
      1913 webster

   sidereal clock, day, month, year. see under clock,
      day, etc.

   sideral time, time as reckoned by sideral days, or, taking
      the sidereal day as the unit, the time elapsed since a
      transit of the vernal equinox, reckoned in parts of a
      sidereal day. this is, strictly, apparent sidereal time,
      mean sidereal time being reckoned from the transit, not of
      the true, but of the mean, equinoctial point.
      1913 webster
see also:
sideral consider desire sidereal clock day month 
year clock day sideral time 

[2] : The Collaborative International Dictionary of English v.0.48

year \year\, n. oe. yer, yeer, yogher, as. ge'ar; akin to
   ofries. i?r, g?r, d. jaar, ohg. j=ar, g. jahr, icel. =ar,
   dan. aar, sw. ar, goth. j?r, gr. ? a season of the year,
   springtime, a part of the day, an hour, ? a year, zend
   y=are year. root4, 279. cf. hour, yore.
   1913 webster
   1. the time of the apparent revolution of the sun trough the
      ecliptic; the period occupied by the earth in making its
      revolution around the sun, called the astronomical year;
      also, a period more or less nearly agreeing with this,
      adopted by various nations as a measure of time, and
      called the civil year; as, the common lunar year of 354
      days, still in use among the mohammedans; the year of 360
      days, etc. in common usage, the year consists of 365 days,
      and every fourth year called bissextile, or leap year of
      366 days, a day being added to february on that year, on
      account of the excess above 365 days see bissextile.
      1913 webster

            of twenty year of age he was, i guess. --chaucer.
      1913 webster

   note: the civil, or legal, year, in england, formerly
         commenced on the 25th of march. this practice continued
         throughout the british dominions till the year 1752.
         1913 webster

   2. the time in which any planet completes a revolution about
      the sun; as, the year of jupiter or of saturn.
      1913 webster

   3. pl. age, or old age; as, a man in years. --shak.
      1913 webster

   anomalistic year, the time of the earth's revolution from
      perihelion to perihelion again, which is 365 days, 6
      hours, 13 minutes, and 48 seconds.

   a year's mind eccl., a commemoration of a deceased
      person, as by a mass, a year after his death. cf. a
      month's mind, under month.

   bissextile year. see bissextile.

   canicular year. see under canicular.

   civil year, the year adopted by any nation for the
      computation of time.

   common lunar year, the period of 12 lunar months, or 354
      days.

   common year, each year of 365 days, as distinguished from
      leap year.

   embolismic year, or intercalary lunar year, the period of
      13 lunar months, or 384 days.

   fiscal year com., the year by which accounts are
      reckoned, or the year between one annual time of
      settlement, or balancing of accounts, and another.

   great year. see platonic year, under platonic.

   gregorian year, julian year. see under gregorian, and
      julian.

   leap year. see leap year, in the vocabulary.

   lunar astronomical year, the period of 12 lunar synodical
      months, or 354 days, 8 hours, 48 minutes, 36 seconds.

   lunisolar year. see under lunisolar.

   periodical year. see anomalistic year, above.

   platonic year, sabbatical year. see under platonic, and
      sabbatical.

   sidereal year, the time in which the sun, departing from
      any fixed star, returns to the same. this is 365 days, 6
      hours, 9 minutes, and 9.3 seconds.

   tropical year. see under tropical.

   year and a day o. eng. law, a time to be allowed for an
      act or an event, in order that an entire year might be
      secured beyond all question. --abbott.

   year of grace, any year of the christian era; anno domini;
      a. d. or a. d.
      1913 webster year 2000 bug
see also:
hour yore bissextile anomalistic year a year's mind a month's mind 
month bissextile year canicular year canicular civil year 
common lunar year common year embolismic year intercalary lunar year fiscal year 
great year platonic year platonic gregorian year julian year 
gregorian julian leap year lunar astronomical year lunisolar year 
lunisolar periodical year sabbatical year sabbatical sidereal year 
tropical year tropical year and a day year of grace 

[3] : WordNet (r) 2.0

year
     n 1: a period of time containing 365 or 366 days; "she is 4
          years old"; "in the year 1920" syn: twelvemonth, yr
     2: a period of time occupying a regular part of a calendar year
        that is used for some particular activity; "a school year"
     3: the period of time that it takes for a planet as, e.g.,
        earth or mars to make a complete revolution around the
        sun; "a martian year takes 687 of our days"
     4: a body of students who graduate together; "the class of
        '97"; "she was in my year at hoehandle high" syn: class
see also:
twelvemonth yr class 

[4] : Moby Thesaurus II by Grady Ward, 1.0

44 moby thesaurus words for "year":
   abundant year, academic year, annum, bissextile year,
   calendar month, calendar year, century, common year, day, decade,
   decennary, decennium, defective year, fiscal year, fortnight, hour,
   leap year, lunar month, lunar year, lunation, luster, lustrum,
   man-hour, microsecond, millennium, millisecond, minute, moment,
   month, moon, quarter, quinquennium, regular year, second, semester,
   session, sidereal year, solar year, sun, term, trimester,
   twelvemonth, week, weekday

[5] : Easton's 1897 Bible Dictionary

year
   heb. shanah, meaning "repetition" or "revolution" gen. 1:14;
   5:3. among the ancient egyptians the year consisted of twelve
   months of thirty days each, with five days added to make it a
   complete revolution of the earth round the sun. the jews
   reckoned the year in two ways, 1 according to a sacred
   calendar, in which the year began about the time of the vernal
   equinox, with the month abib; and 2 according to a civil
   calendar, in which the year began about the time of the autumnal
   equinox, with the month nisan. the month tisri is now the
   beginning of the jewish year.
   

[6] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

year. the period in which the revolution of the earth round the sun, and the 
accompanying changes in the order of nature, are completed. 
     2. the civil year differs from the astronomical, the latter being 
composed of 365 days, 5 hours, 48 seconds and a fraction, while the former 
consists, sometimes of three hundred and sixty-five days, and at others, in 
leap years, of three hundred and sixty-six days. 
     3. the year is divided into half-year which consists, according to co. 
litt. 135 b, of 182 days; and quarter of a year, which consists of 91 days, 
ibid. and 2 roll. ab. 521, 1. 40. it is further divided into twelve months. 
     4. the civil year commences immediately after twelve o'clock at night 
of the thirty-first day of december, that is the first moment of the first 
day of january, and ends at midnight of the thirty-first day of december, 
twelve mouths thereafter. vide com. dig. ann.; 2 bl. com. by chitty, 140, 
n.; chitt. pr. index tit. time alteration of the calendar q.v. from old to 
new style in england, see bissextile, and the colonies of that country in 
america, the year in chronological reckoning was supposed to commence with 
the first day of january, although the legal year did not commence until 
march 25th, the intermediate time being doubly indicated: thus february 15, 
1724, and so on. this mode of reckoning was altered by the statute 24 geo. 
ii. cap. 23, which gave rise to an act of assembly of pennsylvania, passed 
march 11, 1752; 1 sm. laws, 217, conforming thereto, and also to the repeal 
of the act of 1710. 
     5. in new york it is enacted that whenever the term "year" or "years" 
is or shall be used in any statute, deed, verbal or written contract, or any 
public or private instrument whatever, the year intended shall be taken to 
consist of three hundred and sixty-five days; half a year of a hundred and 
eighty-two days; and a quarter of a year of ninety-two days; and the day of 
a leap year, and the day immediately preceding, if they shall occur in any 
period so to be computed, shall be reckoned together as one day. rev. stat. 
part 1, c. 19, t. 1, sec. 3. 

[7] : THE DEVIL'S DICTIONARY ((C)1911 Released April 15 1993)

year, n.  a period of three hundred and sixty-five disappointments.

Year >> Y Words
Year, definition of term: Year
year_pag1.html

Year 2000 >> Y Words
Year 2000, definition of term: Year 2000
year+2000_pag1.html

New Year >> N Words
New Year, definition of term: New Year
new+year_pag1.html

Light Year >> L Words
Light Year, definition of term: Light Year
light+year_pag1.html

Leap Year >> L Words
Leap Year, definition of term: Leap Year
leap+year_pag1.html

Fiscal Year >> F Words
Fiscal Year, definition of term: Fiscal Year
fiscal+year_pag1.html

Great Year >> G Words
Great Year, definition of term: Great Year
great+year_pag1.html

Half Year >> H Words
Half Year, definition of term: Half Year
half+year_pag1.html

Calendar Year >> C Words
Calendar Year, definition of term: Calendar Year
calendar+year_pag1.html