(transitive) To gather (cattle) together by riding around them. / (transitive, idiomatic) To collect or gather (something) together.

Of cattle etc.: gathered together as a group. / (mathematics) Of a real number: converted to an integer by having 0.5 added to it, and the result being rounded down.

simple past tense and past participle of round up

present participle of round up

Third-person singular simple present indicative form of round up