Someone who is cultured and polite — who knows to put his dinner napkin on his lap — is civilized. So could you please behave in a civilized manner and get your feet off the dinner table?

Civilized is an adjective that describes the very opposite of barbarity. A civilized person is polite and courteous; he knows how to say "please" and "thank you." A civilized group of people is characterized by being socially and technologically advanced. Both dinner parties and fancy computer gadgets are signs of a civilized people. That friend of yours who likes to show people how he can belch the entire alphabet? Maybe not.

Definitions of civilized
  1. adjective
    having a high state of culture and development both social and technological
    “terrorist acts that shocked the civilized world”
    synonyms: civilised
    (of societies) highly developed especially in technology or industry
    of or in a condition of social order
    showing evidence of moral and intellectual advancement
    possessing an education (especially having more than average knowledge)
    (used of persons and their behavior) cultivated and genteel
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    noncivilised, noncivilized
    not having a high state of culture and social development
    barbarian, barbaric, savage, uncivilised, uncivilized, wild
    without civilizing influences
    primitive in customs and culture
    nonliterate, preliterate
    used of a society that has not developed writing
    used of preliterate or tribal or nonindustrial societies
    not having a good education
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  2. adjective
    marked by refinement in taste and manners
    synonyms: civilised, cultivated, cultured, genteel, polite
    (used of persons and their behavior) cultivated and genteel
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