- To become quiet and calm after a period of disturbance or restlessness.
- It took John a while to settle down after the phone call.
- To establish a settled lifestyle, and especially to marry.
- 1915, G[eorge] A. Birmingham [pseudonym; James Owen Hannay], chapter I, in Gossamer, New York, N.Y.: George H. Doran Company, OCLC 5661828 ↗:
- It is never possible to settle down to the ordinary routine of life at sea until the screw begins to revolve. There is an hour or two, after the passengers have embarked, which is disquieting and fussy.
- (with "in") to get comfortable with one's new accommodation or circumstances.
- I have not yet settled down in my new apartment.
- Italian: ambientarsi