Definition for Shot
From Biology Forums Dictionary
A take, in part or in its entirety, that is used in the final edited version of the film. In a finished film we refer to a piece of the film between two edits as a shot. Whereas an edit can take the story to a different time or a different place, the action within a shot is spatially and temporally continuous. We can therefore think of a shot as a "piece of time."
Shots are described by distance from the subject (ECU, CU, MCU, MS, MLS, LS, ELS), by camera angle (low, high, eye-level), bycontent (two-shot, three-shot, reaction shot, establishing shot), and by any camera movement (pan, track, dolly, crane, tilt). The average feature film contains between 400 and 1,000 shots.