verb-intransitive. To make a continuous low-pitched buzzing or humming sound.verb-intransitive. To move while making such a sound.verb-intransitive. To climb suddenly and sharply. Used of an airplane.verb-intransitive. To move about rapidly; swoop.verb-intransitive. To simulate movement rapidly away from or toward a subject using a zoom lens.verb-intransitive. Computer Science To cause text or other graphics in a window or frame to appear larger on the screen.v. To cause to zoom.n. The act or sound of zooming.n. A zoom lens.