Zoom  —v. 1 move quickly, esp. With a buzzing sound. 2 cause an aeroplane to mount at high speed and a steep angle. 3 (often foll. By in or in on) (of a camera) change rapidly from a long shot to a close-up (of). 4 (of prices etc.) Rise sharply. —n. 1 aeroplane's steep climb. 2 zooming camera shot. [imitative]