round down

round down (third-person singular simple present rounds down, present participle rounding down, simple past and past participle rounded down)

1. (transitive, arithmetic) To round (a number) to the greatest integer that is not greater than it, or to some other lower value, especially a whole number of hundreds, thousands, etc.

   The total is $25,715, but to keep the figures simple, I'll round it down to $25,000.

• round up

• round off
• round out