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## Definition of *inverse*

(Entry 1 of 2)

1

**:**opposite in order, nature, or effect2

**:**being an inverse function inverse sineinverse

nounDefinition of *inverse* (Entry 2 of 2)

2

**:**a proposition or theorem formed by contradicting both the subject and predicate or both the hypothesis and conclusion of a given proposition or theorem the inverse of "if A then B" is "if not-A then not-B" — compare contrapositive3a

**:**inverse function also**:**an operation (such as subtraction) that undoes the effect of another operationb

**:**a set element that is related to another element in such a way that the result of applying a given binary operation to them is an identity element of the setKeep scrolling for more

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inverseTime Traveler for

inverse## The first known use of

inversewas in the 15th centurySee more words from the same century