(chiefly Britain) A valet or a man's personal manservant.

(chiefly historical) A man of gentle but not noble birth, particularly a man of means (originally ownership of property) who does not work for a living but has no official status in a peerage; (UK law) an armiferous man ranking below a knight.

A surname transferred from the nickname.

Third-person singular simple present indicative form of gentlemanize

(transitive) To make gentlemanly.

present participle of gentlemanize

gentlemanly behaviour or attitudes.

simple past tense and past participle of gentlemanize

A usually unwritten agreement not bound by law but by honour.

A bet in which no money is bet; only the honor of the two parties is at stake. There is no need for proof that one party's side of the bet has been fulfilled; he or she is taken at their word.