together as a sign that you are angry or wor-ried  Take that frown off your face – every-thing’s going to be all right. Synonym scowl

comparative form of low_ more low, verb_ look angry or sullen, wrinkle one's forehead, as if to signal disapproval, move something or somebody to a lower position, cause to drop or sink, transitive verb_ To bring down; to humble, To reduce the degree, intensity, strength, etc, of, To reduce the height of, intransitive verb_ To be dark, gloomy, and threatening, as clouds; to be covered with dark and threatening clouds, as the sky; to show threatening signs of approach, as a tempest, To fall; to sink; to grow less; to diminish; to decrease, noun_ the lower of two berths, Cloudiness; gloominess, A frown; scowl; frowning; sullenness