(chiefly in the passive) To arrest.
The guys who robbed the bank last week have finally been run in.
To use new machinery at less than full speed, preventing damage.
I have to drive slowly for the first 1,000 miles to run the engine in.
To start a new regime slowly.
To score (a try).
To insert (a word, etc.) without making a break or new paragraph.
To alter the position of matter to fill vacant space.
An encounter; a scrape or brush, especially one involving trouble or difficulty.
The end-phase of a competition.
Yahoo Sport's Leicester City blogger Helen Nutter gets ready for the Premier League run-in knowing her side - incredibly - still have a great chance of being crowned champions