Any fact or situation which is known or familiar.
A constant or variable the value of which is already determined.
Accepted, familiar, researched.
Identified as a specific type; famous, renowned.
In preparation for the main matter; initial, introductory, preparatory.
Any of a series of sports events that determine the finalists
A preparation for a main matter; an introduction.
A relatively minor contest that precedes a major one, especially in boxing