used1adjectivebe used to somethingto know something well because you have seen, heard, tasted, done, etc. it a lot: I'm used to walking because I don't have a car.get used to somethingto begin to know something well after a time: I'm getting used to my new job.used2adjectivethat had another owner before; not newsame meaningsecond-hand: The garage sells used cars.oppositenew