1 a future event or circumstance regarded as likely to occur, or as influencing present action.
2 something dependent on another uncertain event or occurrence.
3 uncertainty of occurrence.
4 a one thing incident to another. b an incidental expense etc.
Phrases and idioms:
contingency fund a fund to cover incidental or unforeseen expenses.
Etymology: earlier contingence f. LL contingentia (as CONTINGENT)
Useful english dictionary. 2012.