v. 1. To make round or curved. John decided to round off the corners of the table he was making so that no one would be hurt by bumping them. 2. To change to the nearest whole number. The teacher said to round off the averages. 3. To end in a satisfactory way; put a finishing touch on; finish nicely. We rounded off the dinner with mixed nuts. A boat ride in the moonlight rounded off the day at the lake.
Compare: TOP OFF.