to change (something) from one form or function to another, e.g. to make structural alterations to (a building or part of a building)
to alter the physical or chemical nature or properties of (something), esp in manufacturing
to exchange (e.g. a security or bond) for something of equivalent value
to win (somebody) over from one persuasion or party to another
to experience or cause (somebody) to experience a religious conversion
in rugby, to complete (a try) by successfully kicking a conversion
in American football, to complete (a touchdown) by successfully kicking a conversion
to undergo conversion
to be able to be converted
in American football, to make a conversion
in logic, to interchange the subject1 (3b) and predicate1 (2) to obtain a new proposition