pro

noun

1. An advantage of something, especially when contrasted with its disadvantages (cons).

   “What are the pros and cons of buying a car?”

2. A person who supports a concept or principle.
3. A professional sportsman.
4. (colloquial)Professional.

   “When it comes to DIY, he's a real pro.”

5. (slang)A prostitute.

   “1974, "Fynn" (Sydney Hopkins), Mister God, This Is Anna Millie was one of the dozen or so pros who had a house at the top of the street.”

6. (UK, archaic, slang)A proproctor.
7. (historical, slang)A chemical prophylaxis taken after sex to avoid contracting venereal disease.
8. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of pressure retarded osmosis.
9. (abbreviation, alt-of, countable, initialism, uncountable)Initialism of patient-reported outcome.

   “In the bivariate analysis carried out by subgroups, we did not find statistically significant differences (p < 0.05) between bionaïve or bioexperienced patients, patients with BMI < 30 or BMI > 30 in relation to the efficacy variables (PASI and BSA) and analyzed PROs (VAS pruritus and DLQI).”

prep

1. In favor of.

   “He is pro exercise but against physical exertion, quite a conundrum.”

adj

1. Professional.

   “He landed a pro mentorship gig.”

name

1. A surname from Spanish.

symbol

1. A theoretical phonologically null pronoun
2. Used to indicate personal pronoun in sign language glosses, e.g. PRO.1 or PRO-1 for the first person.