|1.||(tr) to give a place or time to: if my schedule allows it, I'll fit you in|
|2.||(intr, adverb) to belong or conform, esp after adjustment: he didn't fit in with their plans|
Also, fit into. Provide a place or time for. For example, We can't fit in another appointmentthere's no time, or That tree won't fit into the hole you've dug. [Late 1600s]
fit in with. Be suited to, belong. For example, I just don't fit in with this group, or Her mood fitted in with the sad occasion.