v. 1. To mix with; join with. If the paint brush is too wet, the red paint will run into the white on the house. This small brook runs into a big river in the valley below. 2. To add up to; reach; total. Car repairs can run into a lot of money. The number of people killed on the highways during holidays runs into hundreds. A good dictionary may run into several editions. 3a. Bump; crash into; hit. Joe lost control of his bike and ran into a tree.
Compare: RUN DOWN. 3b. To meet by chance. I ran into Joe yesterday on Main Street.
Compare: BUMP INTO, CHANCE ON, COME ACROSS 2 . 3e. Be affected by; get into. I ran into trouble on the last problem on the test. When I ran into a problem while making my model airplane, I asked Uncle Mark for help.