[adj] showing regard for others in manners, speech, behavior, etc.
[adj] not rude; marked by satisfactory (or especially minimal) adherence to social usages and sufficient but not noteworthy consideration for others; "even if he didn't like them he should have been civil"- W.S. Maugham
[adj] marked by refinement in taste and manners; "cultivated speech"; "cultured Bostonians"; "cultured tastes"; "a genteel old lady"; "polite society"
civil, civilised, civilized, courteous, cultivated, cultured, genteel, gracious, mannerly, nice, refined, well-mannered