round off

verb3

1. •
   To change the shape of (an object) to make it smoother and especially more circular or ovoid.
2. •
   To change (a number) to an approximation having fewer significant digits.

   • The instructions say that we are not to round off until we reach the final figure. [in a calculation with interim steps]
   • Round off 15.4 to 15, round off 15.51 to 15.5 or to 16, round off 0.499 to 0, and round off 970,000 to 1 million.
3. •
   To complete or finish something.