well manneredEnglishOxford American Thesauruswell mannered adjective they were well mannered and eager to please: polite, courteous, well behaved, civil, gentlemanly, ladylike, genteel, decorous, respectful, refined, polished, civilized, cultivated, gracious, chivalrous, urbane, well bred, well brought up; dated mannerly. ▷antonyms rude.