The Collaborative International Dictionary
To lock into
Lock \Lock\, v. i. To become fast, as by means of a lock or by interlacing; as, the door locks close.
When it locked none might through it pass.
--Spenser.
To lock into, to fit or slide into; as, they lock into each
other.
--Boyle.
Usage examples of "to lock into".
He watched as the tailerons of Max's fighter folded down and the wings swept fully back to lock into place.