noun

1. (often with of, typically of adverse results) The source of, or reason for, an event or action; that which produces or effects a result.

   “They identified a burst pipe as the cause of the flooding.”

2. (especially with for and a bare noun) Sufficient reason for a state, as of emotion.

   “The end of the war was a cause for celebration.”

3. A goal, aim or principle, especially one which transcends purely selfish ends.

Synonyms: grounds, justification

verb

1. To set off an event or action.

   “The lightning caused thunder.”

2. (ditransitive) To actively produce as a result, by means of force or authority.

   “His dogged determination caused the fundraising to be successful.”

3. To assign or show cause; to give a reason; to make excuse.