converse

Short definition from Wiktionary

Verb

1. 1
   To talk; to engage in conversation.
2. 2
   To keep company; to hold intimate intercourse; to commune.
3. 3
   To have knowledge of something, from long talk or study.

Noun

1. 1
   Free verbal interchange of thoughts or views; conversation; chat.
2. 2
   The opposite or reverse.
3. 3
   Of a proposition or theorem consisting of a statement of the form "If A is true, then B is true", the statement "If B is true, then A is true" which need not be equivalent to the first one.
4. 4
   One of a pair of terms that name or describe a relationship from opposite perspectives; converse antonym; relational antonym.
5. 5
   Synonym of transpose.

Adjective

1. 1
   Opposite; reversed in order or relation; reciprocal.

Proper noun

1. 1
   A surname.
2. 2
   A shoe of an American-based brand of that name.