Drum  —n. 1 hollow esp. Cylindrical percussion instrument covered at the end(s) with plastic etc. 2 (often in pl.) Percussion section of an orchestra etc. 3 sound made by a drum. 4 thing resembling a drum, esp. A container, etc. 5 segment of a pillar. 6 eardrum. —v. (-mm-) 1 play a drum. 2 beat or tap continuously with the fingers etc. 3 (of a bird or insect) make a loud noise with the wings.  drum into drive (a lesson or facts) into (a person) by persistence. Drum out dismiss with ignominy. Drum up summon or get by vigorous effort (drum up support). [low german]