Of a proposition or theorem of the form: given that "If A is true, then B is true", then "If B is true, then A is true." equivalently: given that "All Xs are Ys", then "All Ys are Xs". (noun)
To talk; to engage in conversation. (verb)
(now literary) Familiar discourse; free interchange of thoughts or views; conversation; chat. (noun)
Examples of word converse
_Contrast'_ the two. converse Did you _converse'_ with him?
V. ii.744 (463,8) [In the converse of breath] Perhaps _converse_ may, in this line, mean _interchange_.
Is the term converse here used in its logical meaning?
You don't hear of a lot of women raping men, but the converse is a major social problem.
Historically, the converse is the case: attempts to weaken [a sovereign] either destroy it, resulting in chaos and death, or force it to compensate by enlarging, resulting in the familiar “red-giant state.”