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

gregorian \grego"rian\, a. nl. gregorianus, fr. gregorius
   gregory, gr. ?: cf. f. gr'egorien.
   pertaining to, or originated by, some person named gregory,
   especially one of the popes of that name.
   1913 webster

   gregorian calendar, the calendar as reformed by pope
      gregory xiii. in 1582, including the method of adjusting
      the leap years so as to harmonize the civil year with the
      solar, and also the regulation of the time of easter and
      the movable feasts by means of epochs. see gregorian
      year below.

   gregorian chant mus., plain song, or canto fermo, a kind
      of unisonous music, according to the eight celebrated
      church modes, as arranged and prescribed by pope gregory
      i. called "the great" in the 6th century.

   gregorian modes, the musical scales ordained by pope
      gregory the great, and named after the ancient greek
      scales, as dorian, lydian, etc.

   gregorian telescope opt., a form of reflecting telescope,
      named from prof. james gregory, of edinburgh, who
      perfected it in 1663. a small concave mirror in the axis
      of this telescope, having its focus coincident with that
      of the large reflector, transmits the light received from
      the latter back through a hole in its center to the
      eyepiece placed behind it.

   gregorian year, the year as now reckoned according to the
      gregorian calendar. thus, every year, of the current
      reckoning, which is divisible by 4, except those divisible
      by 100 and not by 400, has 366 days; all other years have
      365 days. see bissextile, and note under style, n., 7.
      1913 webster
see also:
gregorian calendar gregorian year gregorian chant gregorian modes gregorian telescope gregorian year 
bissextile style 

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

calendar \cal"endar\, n. oe. kalender, calender, fr. l.
   kalendarium an interest or account book cf. f. calendrier,
   of. calendier fr. l. calendue, kalendae, calends. see
   calends.
   1. an orderly arrangement of the division of time, adapted to
      the purposes of civil life, as years, months, weeks, and
      days; also, a register of the year with its divisions; an
      almanac.
      1913 webster

   2. eccl. a tabular statement of the dates of feasts,
      offices, saints' days, etc., esp. of those which are
      liable to change yearly according to the varying date of
      easter.
      1913 webster

   3. an orderly list or enumeration of persons, things, or
      events; a schedule; as, a calendar of state papers; a
      calendar of bills presented in a legislative assembly; a
      calendar of causes arranged for trial in court; a calendar
      of a college or an academy.
      1913 webster

   note: shepherds of people had need know the calendars of
         tempests of state. --bacon.
         1913 webster

   calendar clock, one that shows the days of the week and
      month.

   calendar month. see under month.

   french republican calendar. see under vend'emiaire.

   gregorian calendar, julian calendar, perpetual
   calendar. see under gregorian, julian, and perpetual.
      1913 webster
see also:
calends calendar clock calendar month month french republican calendar vend'emiaire 
gregorian calendar julian calendar perpetual calendar gregorian julian 
perpetual 

[3] : WordNet (r) 2.0

gregorian calendar
     n : the solar calendar now in general use, introduced by gregory
         xiii in 1582 to correct an error in the julian calendar
         by suppressing 10 days, making oct 5 be called oct 15,
         and providing that only centenary years divisible by 400
         should be leap years; it was adopted by great britain and
         the american colonies in 1752 syn: new style calendar
see also:
new style calendar 

Gregorian >> G Words
Gregorian, definition of term: Gregorian
gregorian_pag1.html

Calendar >> C Words
Calendar, definition of term: Calendar
calendar_pag1.html

Gregorian Chant >> G Words
Gregorian Chant, definition of term: Gregorian Chant
gregorian+chant_pag1.html

Gregorian Calen >> G Words
Gregorian Calen, definition of term: Gregorian Calen
gregorian+calen_pag1.html

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

Calendar Month >> C Words
Calendar Month, definition of term: Calendar Month
calendar+month_pag1.html

Calendar Week >> C Words
Calendar Week, definition of term: Calendar Week
calendar+week_pag1.html

Roman Calendar >> R Words
Roman Calendar, definition of term: Roman Calendar
roman+calendar_pag1.html

Muslim Calendar >> M Words
Muslim Calendar, definition of term: Muslim Calendar
muslim+calendar_pag1.html

Jewish Calendar >> J Words
Jewish Calendar, definition of term: Jewish Calendar
jewish+calendar_pag1.html

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