The meaning of PRO is an argument or evidence in affirmation. How to use pro in a sentence.

PRO definition: in favor of a proposition, opinion, etc. See examples of pro used in a sentence.

1. a prefix, having anti- as its opposite, used to form adjectives that have the general sense “favoring” the group, interests, course of action, etc., denoted by the headword: pro-choice; pro-American; prowar.

A pro player is a professional sportsman or woman. You can also use pro to refer to sports that are played by professional sportsmen or women.

PRO meaning: 1. an advantage to or a reason for doing something: 2. a person who plays a sport as a job rather…. Learn more.

An argument in favor of something. The pros and cons of a matter. A person who favors the affirmative side of some debatable question. A vote for the affirmative. A professional, especially in sports. An …

Jan 20, 2026 · Noun [edit] pro (plural pros) (slang, historical) A chemical prophylaxis taken after sex to avoid contracting venereal disease.