/kon'treuh peuh zish"euhn/ , n.
1. placement opposite or against.
2. opposition, contrast, or antithesis.
3. Logic. the inference drawn from a proposition by negating its terms and changing their order, as by inferring "Not B implies not A" from "A implies B."
[ 1545-55; contraposition- (s. of contrapositio ). See CONTRA- 1 , POSITION ]