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

opposite \op"posite\ o^p"p-ozi^t or
   o^p"p-osi^t, a. f., fr. l. oppositus, p. p. of
   opponere. see opponent.
   1. placed over against; standing or situated over against or
      in front; facing; -- often with to; as, a house opposite
      to the exchange; the concert hall and the state theater
      stood opposite each other on the plaza.
      1913 webster

   2. situated on the other end of an imaginary line passing
      through or near the middle of an intervening space or
      object; -- of one object with respect to another; as, the
      office is on the opposite side of town; -- also used both
      to describe two objects with respect to each other; as,
      the stores were on opposite ends of the mall.
      pjc

   3. applied to the other of two things which are entirely
      different; other; as, the opposite sex; the opposite
      extreme; antonyms have opposite meanings.
      1913 webster +pjc

   4. extremely different; inconsistent; contrary; repugnant;
      antagonistic.
      1913 webster

            novels, by which the reader is misled into another
            sort of pleasure opposite to that which is designed
            in an epic poem.                      --dryden.
      1913 webster

            particles of speech have divers, and sometimes
            almost opposite, significations.      --locke.
      1913 webster

   5. bot.
      a set over against each other, but separated by the
          whole diameter of the stem, as two leaves at the same
          node.
      b placed directly in front of another part or organ, as
          a stamen which stands before a petal.
          1913 webster
see also:
opponent 

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

opposite \op"posite\, n.
   1. one who opposes; an opponent; an antagonist. obs.
      1913 webster

            the opposites of this day's strife.   --shak.
      1913 webster

   2. that which is opposed or contrary in character or meaning;
      as, sweetness and its opposite; up is the opposite of
      down.
      1913 webster +pjc

            the virtuous man meets with more opposites and
            opponents than any other.             --landor.
      1913 webster

   polar opposite that which is conspicuously different in
      most important respects.
      pjc
see also:
polar opposite 

[3] : WordNet (r) 2.0

opposite
     adj 1: being directly across from each other; facing; "and i on the
            opposite shore will be, ready to ride and spread the
            alarm"- longfellow; "we lived on opposite sides of the
            street"; "at opposite poles"
     2: of leaves etc; growing in pairs on either side of a stem;
        "opposite leaves" syn: paired ant: alternate
     3: moving or facing away from each other; "looking in opposite
        directions"; "they went in opposite directions"
     4: the other one of a complementary pair; "the opposite sex";
        "the two chess kings are set up on squares of opposite
        colors"
     5: altogether different in nature or quality or significance;
        "the medicine's effect was opposite to that intended"; "it
        is said that opposite characters make a union happiest"-
        charles reade
     6: characterized by opposite extremes; completely opposed; "in
        diametric contradiction to his claims"; "diametrical or
        opposite points of view"; "opposite meanings"; "extreme
        and indefensible polar positions" syn: diametric, diametrical,
         polar
     n 1: two words that express opposing concepts; "to him the
          opposite of gay was depressed" syn: antonym, opposite
          word
     2: a relation of direct opposition; "we thought sue was older
        than bill but just the reverse was true" syn: reverse,
        contrary
     3: a contestant that you are matched against syn: opposition,
         opponent
     4: something inverted in sequence or character or effect; "when
        the direct approach failed he tried the inverse" syn: inverse
     adv : directly facing each other; "the two photographs lay
           face-to-face on the table"; "lived all their lives in
           houses face-to-face across the street"; "they sat
           opposite at the table" syn: face-to-face
see also:
paired alternate diametric diametrical polar antonym 
opposite word reverse contrary opposition opponent 
inverse face-to-face 

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

146 moby thesaurus words for "opposite":
   across, adversary, adversative, adverse, adversive, against, alien,
   antagonistic, anti, antipathetic, antipodal, antipode, antipodean,
   antipodes, antipole, antithesis, antithetic, antithetical, antonym,
   antonymous, at cross-purposes, at opposite extremes, back to back,
   balancing, clashing, compensating, competitive, con, conflicting,
   confronting, contra, contradictory, contradistinct, contrapositive,
   contrarious, contrariwise, contrary, contrary to, contrast,
   contrasted, contrasting, converse, counter, counteractive,
   counterbalance, counterbalancing, countercheck, counterpoint,
   counterpoise, counterpoised, counterpole, counterterm,
   countervailing, cross, dead against, detrimental, different,
   differing, difficult, disaccordant, discordant, discrepant,
   dissentient, dissimilar, divergent, diverse, enemy,
   eyeball to eyeball, eyeball-to-eyeball, face to face, facing, foil,
   fractious, fronting, hard, harmful, hostile, in contact with,
   in contrast with, in front of, in opposition, in opposition to,
   inconsistent, independent, inimical, inverse, irreconcilable,
   just opposite, miserable, negative, noncooperative, nose to nose,
   not easy, obstinate, obverse, offset, on, opponent, opposed,
   opposing, opposite number, opposite to, oppositional, oppositive,
   oppugnant, over against, overthwart, perverse, polar, polaric,
   polarized, poles apart, recalcitrant, refractory, replica,
   repugnant, reverse, rigorous, rival, separate, setoff, sinister,
   squared off, stressful, the contrary, the other side, to, toward,
   troublesome, troublous, trying, unalike, unconnected,
   uncooperative, unfavorable, unfriendly, unlike, unpropitious,
   unrelated, unsimilar, untoward, up against, upon, versus,
   vis-a-vis, wretched

Opposite >> O Words
Opposite, definition of term: Opposite
opposite_pag1.html

Opposite Number >> O Words
Opposite Number, definition of term: Opposite Number
opposite+number_pag1.html