n. 1. A street on which cars can move without stopping at intersections, but cars on streets crossing it have to stop at the intersection. You have to be especially careful crossing a through street. Mr. Jones stopped his car when he came to the through street. He waited until there were no cars on it, and drove across it.
Antonym: STOP STREET. 2. A street that is open to other streets at both ends; a street that has a passage through it, so that it is not necessary to come back to get out of it. We thought we could get through to Main St. by going up a side street but there was a sign that said "Not a through street."