(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.