n. 1.a lump on the body caused by a blow 2.something that bulges out or is protuberant or projects from a form 3.an impact (as from a collision) bump v. 1.knock against with force or violence 2.come upon, as if by accident 3.dance erotically or dance with the pelvis thrust forward 4.assign to a lower position 5.remove or force from a position of dwelling previously occupied
