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Meaning of INVERSE

Pronunciation:  [n]'invurs, [v]in'vurs, 'invurs

WordNet Dictionary
  1. [n]  (math) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the inverse of 7 is 1/7
  2. [n]  something inverted in sequence or character or effect; "when the direct approach failed he tried the inverse"
  3. [adj]  reversed (turned backward) in order or nature or effect
  4. [adj]  (mathematics) varying in a manner opposite to that of another quantity; "a term is in inverse proportion to another term if it increases (or decreases) as the other decreases (or increases)"
  5. [adj]  inversely related; "1/2 is the inverse of 2"

INVERSE is a 7 letter word that starts with I.


 Synonyms: backward, opposite, reciprocal, reciprocal, reverse
 Antonyms: direct
 See Also: oppositeness, opposition, reciprocality, reciprocity



Webster's 1913 Dictionary
  1. \In*verse"\, a. [L. inversus, p. p. of invertere: cf. F.
    inverse. See {Invert}.]
    1. Opposite in order, relation, or effect; reversed;
       inverted; reciprocal; -- opposed to {direct}.
    2. (Bot.) Inverted; having a position or mode of attachment
       the reverse of that which is usual.
    3. (Math.) Opposite in nature and effect; -- said with
       reference to any two operations, which, when both are
       performed in succession upon any quantity, reproduce that
       quantity; as, multiplication is the inverse operation to
       division. The symbol of an inverse operation is the symbol
       of the direct operation with -1 as an index. Thus sin-1 x
       means the arc whose sine is x.
    {Inverse figures} (Geom.), two figures, such that each point
       of either figure is inverse to a corresponding point in
       the order figure.
    {Inverse points} (Geom.), two points lying on a line drawn
       from the center of a fixed circle or sphere, and so
       related that the product of their distances from the
       center of the circle or sphere is equal to the square of
       the radius.
    {Inverse}, or {Reciprocal}, {ratio} (Math.), the ratio of the
       reciprocals of two quantities.
    {Inverse}, or {Reciprocal, {proportion}, an equality between
       a direct ratio and a reciprocal ratio; thus, 4 : 2 : : 1/3
       : 1/6, or 4 : 2 : : 3 : 6, inversely.
  2. \In"verse\, n.
    That which is inverse.
          Thus the course of human study is the inverse of the
          course of things in nature.              --Tatham.
Computing Dictionary

Given a function, f : D -> C, a function g : C -> D is called a left inverse for f if for all d in D, g (f d) = d and a right inverse if, for all c in C, f (g c) = c and an inverse if both conditions hold. Only an injection has a left inverse, only a surjection has a right inverse and only a bijection has inverses. The inverse of f is often written as f with a -1 superscript.

Thesaurus Terms
 Related Terms: adversative, adverse, adversive, antagonistic, anti, antipathetic, antipodal, antipode, antipodes, antipole, antithesis, antithetic, antonym, antonymous, at cross-purposes, balancing, change, clashing, compensating, conflicting, confronting, contra, contradictory, contradistinct, contrapositive, contrarious, contrary, contrasted, converse, counter, counterbalance, counterbalancing, countercheck, counterpoint, counterpoise, counterpoised, counterpole, counterterm, countervailing, dead against, discordant, discrepant, eyeball to eyeball, eyeball-to-eyeball, facing, foil, heads, hostile, inconsistent, inimical, invert, obverse, offset, opposed, opposing, opposite, opposite number, opposite side, oppositional, oppositive, oppugnant, other face, other side, perverse, polar, polaric, polarized, repugnant, reverse, revert, setoff, squared off, tails, the contrary, the other side, transplace, transpose, turn, vis-a-vis