Definitions from Wiktionary ( )

▸ verb:  (intransitive) To become involved in a situation, so as to alter or prevent an action.
▸ verb:  (intransitive) To occur, fall, or come between, points of time, or events.
▸ verb:  (intransitive) To occur or act as an obstacle or delay.
▸ verb:  (ambitransitive) To say (something) in the middle of a conversation or discussion between other people, or to respond to a situation involving other people.
▸ verb:  (ambitransitive) To come between, or to be between, persons or things.
▸ verb:  (law) In a suit to which one has not been made a party, to put forward a defense of one's interest in the subject matter.

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