Contingency

Webster's Dictionary

(1): (n.) An event which may or may not occur; that which is possible or probable; a fortuitous event; a chance.

(2): (n.) An adjunct or accessory.

(3): (n.) A certain possible event that may or may not happen, by which, when happening, some particular title may be affected.

(4): (n.) The quality or state of being contingent or casual; the possibility of coming to pass.

(5): (n.) Union or connection; the state of touching or contact.