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at most

at most idiom

Also, at the most or at the outside. At the largest amount, the furthest limit; also, in the most extreme case. For example, She'll be finished in two weeks at the most, or It'll take two weeks at the outside, or At most the chef uses a tiny bit of pepper. The terms with most date from the 1300s; at the outside from the mid-1800s. Also see at best.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.