[əbˈvəːt], (Verb)

Definitions:
- alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g. ‘no men are immortal’ to ‘all men are mortal’


Phrases:

Origin:
early 17th century (in the sense ‘turn something until it is facing’): from Latin obvertere, from ob- ‘towards’ + vertere ‘to turn’