Explanation:
1: to occur, fall, or come between points of time or events
only six months intervened between their marriage and divorce
2: to enter or appear as an irrelevant or extraneous feature or circumstance
it's business as usual until a crisis intervenes
3a: to come in or between by way of hindrance or modification
intervene to stop a fight
b: to interfere with the outcome or course especially of a condition or process (as to prevent harm or improve functioning)
4: to occur or lie between two things
5a: to become a third party to a legal proceeding begun by others for the protection of an alleged interest
b: to interfere usually by force or threat of force in another nation's internal affairs especially to compel or prevent an action
