pro·fess / prəˈfes; prō-/ • v. [tr.] 1. claim openly but often falsely that one has (a quality or feeling): he had professed his love for her| I don't profess to be an expert | (profess oneself) he professed himself amazed at the boy's ability. 2. affirm one's faith in or allegiance to (a religion or set of beliefs): a people professing Christianity. ∎ (be professed) be received into a religious order under vows: she entered St. Margaret's Convent, and was professed in 1943.3. dated or humorous teach (a subject) as a professor: a professor—what does he profess?4. archaic have or claim knowledge or skill in (a subject or accomplishment).