To find or meet by chance.
He came across a dollar bill in the suit he was sending to the cleaner.
I came across George at a party last week; it was the first time I had seen him in months.
The other day I ran across a book that you might like.
While Cheryl was cleaning the attic, she came across some very old coins. It took her by surprise to run across something like that.
To give or do what is asked.
For hours the police questioned the man suspected of kidnapping the child, and finally he came across with the story.
The robber told the woman to come across with her purse.