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

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

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

Jan 15, 2026 · Noun [edit] pro (plural pros) (slang, historical) A chemical prophylaxis taken after sex to avoid contracting venereal disease.

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 …

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.

In some words, as proconsul, proprætor, pronoun, etc., it is properly the preposition (Latin pro, for, instead of). from the GNU version of the Collaborative International Dictionary of English.

Pro is an abbreviation meaning "professional". PRO can have several meanings depending on the context, but generally it refers to someone who is in favor of or supportive of something.

He is a pro when it comes to household repairs. She handled that tricky situation like an old pro. He is playing in the pros now.