v. & n.
v. 1 intr. move quickly, esp. with a buzzing sound. 2 a intr. cause an aeroplane to mount at high speed and a steep angle. b tr. cause (an aeroplane) to do this. 3 a intr. (of a camera) close up rapidly from a long shot to a close-up. b tr. cause (a lens or camera) to do this.
n. 1 an aeroplane's steep climb. 2 a zooming camera shot. zoom lens a lens allowing a camera to zoom by varying the focal length.
[ imit. ]