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

weight \weight\, n. oe. weght, wight, as. gewiht; akin to d.
   gewigt, g. gewicht, icel. vaett, sw. vigt, dan. vaegt.
   see weigh, v. t.
   1913 webster
   1. the quality of being heavy; that property of bodies by
      which they tend toward the center of the earth; the effect
      of gravitative force, especially when expressed in certain
      units or standards, as pounds, grams, etc.
      1913 webster

   note: weight differs from gravity in being the effect of
         gravity, or the downward pressure of a body under the
         influence of gravity; hence, it constitutes a measure
         of the force of gravity, and being the resultant of all
         the forces exerted by gravity upon the different
         particles of the body, it is proportional to the
         quantity of matter in the body.
         1913 webster

   2. the quantity of heaviness; comparative tendency to the
      center of the earth; the quantity of matter as estimated
      by the balance, or expressed numerically with reference to
      some standard unit; as, a mass of stone having the weight
      of five hundred pounds.
      1913 webster

            for sorrow, like a heavy-hanging bell,
            once set on ringing, with his own weight goes.
                                                  --shak.
      1913 webster

   3. hence, pressure; burden; as, the weight of care or
      business. "the weight of this said time." --shak.
      1913 webster

            for the public all this weight he bears. --milton.
      1913 webster

            he who singly bore the world's sad weight.
                                                  --keble.
      1913 webster

   4. importance; power; influence; efficacy; consequence;
      moment; impressiveness; as, a consideration of vast
      weight.
      1913 webster

            in such a point of weight, so near mine honor.
                                                  --shak.
      1913 webster

   5. a scale, or graduated standard, of heaviness; a mode of
      estimating weight; as, avoirdupois weight; troy weight;
      apothecaries' weight.
      1913 webster

   6. a ponderous mass; something heavy; as, a clock weight; a
      paper weight.
      1913 webster

            a man leapeth better with weights in his hands.
                                                  --bacon.
      1913 webster

   7. a definite mass of iron, lead, brass, or other metal, to
      be used for ascertaining the weight of other bodies; as,
      an ounce weight.
      1913 webster

   8. mech. the resistance against which a machine acts, as
      opposed to the power which moves it. obs.
      1913 webster

   atomic weight. chem. see under atomic, and cf.
      element.

   dead weight, feather weight, heavy weight, light
   weight, etc. see under dead, feather, etc.

   weight of observation astron.  physics, a number
      expressing the most probable relative value of each
      observation in determining the result of a series of
      observations of the same kind.
      1913 webster

   syn: ponderousness; gravity; heaviness; pressure; burden;
        load; importance; power; influence; efficacy;
        consequence; moment; impressiveness.
        1913 webster
see also:
weigh atomic weight atomic element dead weight feather weight 
heavy weight light weight dead feather weight of observation 

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

atomic \atom"ic\, atomical \atom"ical\, a. cf. f. atomique.
   1. of or pertaining to atoms.
      1913 webster

   2. extremely minute; tiny.
      1913 webster

   atomic bomb, see atom bomb in the vocabulary.

   atomic philosophy, or doctrine of atoms, a system which,
      assuming that atoms are endued with gravity and motion,
      accounted thus for the origin and formation of all things.
      this philosophy was first broached by leucippus, was
      developed by democritus, and afterward improved by
      epicurus, and hence is sometimes denominated the epicurean
      philosophy.

   atomic theory, or the doctrine of definite proportions
      chem., teaches that chemical combinations take place
      between the supposed ultimate particles or atoms of
      bodies, in some simple ratio, as of one to one, two to
      three, or some other, always expressible in whole numbers.
      

   atomic weight chem., the weight of the atom of an element
      as compared with the weight of the atom of hydrogen, taken
      as a standard.
      1913 webster
see also:
atomic bomb atom bomb atomic philosophy doctrine of atoms atomic theory doctrine of definite proportions 
atomic weight 

[3] : WordNet (r) 2.0

atomic weight
     n : chemistry the ratio of the atomic mass of an element to
         half the atomic mass of carbon-12 syn: relative atomic
         mass
see also:
relative atomic mass 

Atomic Weight >> A Words
Atomic Weight, definition of term: Atomic Weight
atomic+weight_pag1.html

Atomic >> A Words
Atomic, definition of term: Atomic
atomic_pag1.html

Atomic Volume >> A Words
Atomic Volume, definition of term: Atomic Volume
atomic+volume_pag1.html

Atomic Number >> A Words
Atomic Number, definition of term: Atomic Number
atomic+number_pag1.html

Atomic Theory >> A Words
Atomic Theory, definition of term: Atomic Theory
atomic+theory_pag1.html

Atomic Clock >> A Words
Atomic Clock, definition of term: Atomic Clock
atomic+clock_pag1.html

Atomic Energy >> A Words
Atomic Energy, definition of term: Atomic Energy
atomic+energy_pag1.html

Atomic Bomb >> A Words
Atomic Bomb, definition of term: Atomic Bomb
atomic+bomb_pag1.html

Atomic Mass >> A Words
Atomic Mass, definition of term: Atomic Mass
atomic+mass_pag1.html

Imperial Weight >> I Words
Imperial Weight, definition of term: Imperial Weight
imperial+weight_pag1.html

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