pros and cons

plural noun

1. the favorable and the unfavorable factors or reasons; advantages and disadvantages.

pros and cons

plural noun

1. the various arguments in favour of and against a motion, course of action, etc

Word History and Origins

Origin of pros and cons¹

C16: from Latin prō for + con, from contrā against

Idioms and Phrases

Arguments or considerations for and against something, as in We'd best weigh all the pros and cons before we decide to add a new wing to the library. This idiom is taken from the Latin pro for “for” and con for “against.” [Late 1500s]