Definition from macmillandictionary.com
He explained the project to me and how my job fits in.
He didn’t fit in with her plans, so she left him.
I tried to fit in, but they were all much younger than I was.
She fitted in with her new colleagues straight away.
He fits in his work around his family commitments.
Dr Halden can fit you in this morning at 10.
How many lines can you fit in per page?
I’ll come in your car, if you can fit me in.