in a concentrated manner; "old houses are often so densely packed that perhaps three or four have to be demolished for every new one built"; "a thickly populated area"集中しているさま高密度
例:a thickly populated area 人口密度が高い地域
spoken with poor articulation as if with a thick tongue; "after a few drinks he was beginning to speak thickly"しわがれた声などで、不明瞭に話す不明瞭に