contingent

Concise Oxford English Dictionary © 2008 Oxford University Press:
contingent /kənˈtɪndʒ(ə)nt/

▶adjective

• 1 subject to chance.

  ■ (contingent on/upon) dependent on.

  ■ (of losses, liabilities, etc.) that can be anticipated to arise if a particular event occurs.

• 2 Philosophy true by virtue of the way things in fact are and not by logical necessity.

▶noun a group of people within a larger group.

■ a body of troops or police sent to join a larger force.

– derivatives
contingently adverb.

– origin ME: from L. contingere ‘befall’, from con- ‘together with’ + tangere ‘to touch’.