to come across: to meet or find unexpectedly (also: to run across); to be perceived or judged as (also: to come off)
- While Cheryl was cleaning the attic, she came across some very old coins. It took her by surprise to run across something like that.
- Jeff's boss comes across as a tough, unpleasant person, but actually Jeff says that he is a good employer.
- Some people come off quite differently than they really are.