dependent for existence, occurrence, character, etc., on something not yet certain; conditional (often followed by on or upon ): Our plans are contingent on the weather.
2.
liable to happen or not; uncertain; possible: They had to plan for contingent expenses.
3.
happening by chance or without known cause; fortuitous; accidental: contingent occurrences.
4.
Logic.(of a proposition) neither logically necessary nor logically impossible, so that its truth or falsity can be established only by sensory observation.
noun
5.
a quota of troops furnished.
6.
any one of the representative groups composing an assemblage: the New York contingent at a national convention.
7.
the proportion that falls to one as a share to be contributed or furnished.