Used attributively (e.g., ‘gentleman farmer’) to denote something characteristic of or associated with a gentleman.
Definitions
Characteristic of, appropriate to, or associated with a gentleman; gentlemanly or decorous. The club enforced a gentleman standard of attire, requiring jackets and ties.
Designating a man who pursues an occupation or activity as an amateur rather than as a professional. Charles Darwin began as a gentleman scientist, funding his own research and voyages.