round up

verb4

1. •
   To collect or gather (something) together.

   • The city hall needs to round up all the wrongly parked bikes across the city.
   • They rounded up a group of experts and got their opinions.
2. •
   To gather (livestock such as cattle, sheep, geese, etc.) together, such as by encircling them.

   • In the autumn we round up all the hill sheep and bring them down into the barn.
3. •
   To round (a number) to the smallest integer that is not less than it, or to some other greater value, especially a whole number of hundreds, thousands, etc.

   • The total is $24,995 — let's round it up to $25,000.
4. •
   To arrest or detain a group of people based on collective (rather than individualized) cause or suspicion, often as a form of targeted persecution.

   • During the Holocaust, the Nazis rounded up Jews into ghettos and concentration camps.
   • Major Strasser has been shot. Round up the usual suspects.