run into sth: REACH A LEVEL If an amount runs into thousands, millions, etc, it reaches that level.
run off: informal to leave somewhere unexpectedly
run on sth: If a machine runs on a supply of power, it uses that power to work.
run out: USE to use all of something so that there is none left
run out: BE USED If a supply of something runs out, there is none left because it has all been used.
run sb / sth over: to hit someone or something with a vehicle and drive over them, injuring or killing them
run through sth: to repeat something in order to practise it or to make sure that it is correct
run sth up: If you run up a debt, you do things which cause you to owe a large amount of money.
run up against sth: If you run up against problems or difficulties, you begin to experience them.
run across sb: to meet someone you know when you are not expecting to
run after sb / st: to chase someone or something that is moving away from you
run around: to be very busy doing a lot of different things
run away: to secretly leave a place because you are unhappy there
run sth by sb: to tell someone about something so that they can give their opinion about it
run sb / sth down: informal to criticize someone or something, often unfairly
run for sth: to compete in an election
run into sb: to meet someone you know when you are not expecting to
run into sth: HIT to hit something while you are driving a vehicle
run into sth: PROBLEMS If you run into difficulties, you begin to experience them.