|the offspring of a zebra and a donkey.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|1.||denoting the quickest or most direct route or system: fast-track executives; a fast-track procedure for libel claims|
|2.||(tr) to speed up the progress of (a project or person)|
A situation involving high pressure, competition, and, especially, rapid success or advancement. For example, He was definitely on a fast track, becoming a partner after only five years in the firm, or This company was on the fast track in software development. This term alludes to a dry, hard horse track that enables horses to run at high speeds. [Colloquial; mid-1960s] Also see fast lane.