on the contrary

on the contrary idiom
It's the opposite, as in Is his shoulder hurting?—On the contrary, it's all better, or We thought you didn't like opera.—On the contrary, I love it. This phrase, at first put as by or for or in the contrary, dates from the late 1300s; on has been used since the mid-1800s.

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.

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