Definitions from Wiktionary ( )

▸ noun:  (countable, often with of, typically of adverse results) The source of, or reason for, an event or action; that which produces or effects a result.
▸ noun:  (uncountable, especially with for and a bare noun) Sufficient reason.
▸ noun:  (countable) A goal, aim or principle, especially one which transcends purely selfish ends.
▸ noun:  (obsolete) Sake; interest; advantage.
▸ noun:  (countable, obsolete) Any subject of discussion or debate; a matter; an affair.
▸ noun:  (countable, law) A suit or action in court; any legal process by which a party endeavors to obtain his claim, or what he regards as his right; case; ground of action.
▸ verb:  (transitive) To set off an event or action.
▸ verb:  (ditransitive) To actively produce as a result, by means of force or authority.
▸ verb:  (obsolete) To assign or show cause; to give a reason; to make excuse.

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