|on the market
||ready to sell, for sale, up for sale
||Yes, our house is on the market. We want to sell it by October 1.
|on the mend
||healing, becoming healthy again
||Jake's had open-heart surgery, but he's on the mend.
|on the money
||correct, accurate, on the mark, spot on
||Your answer is on the money. You win a new Honda!
|on the move
||moving, going from place to place
||The caribou are on the move again, migrating to find food.
|on the outs
||not friendly, not speaking
||Amy and Pat are on the outs. They had a fight.
|on the QT
||as a secret, not to be told to anyone
||I'm telling you this on the QT. Please don't tell anyone.
|on the rails
||operating smoothly, on track
||Troy helped me get back on the rails when I was depressed.
|on the rise
||The number of female engineers is on the rise - more every year.
|on the road
||going toward, improving, on the mend
||Jill is feeling much better today. She's on the road to recovery.
|on the run
||very busy, having much to do, on the go
||I've been on the run since early this morning. What a busy day!