- simple past tense of undo.
- to reverse the doing of; cause to be as if never done: Murder once done can never be undone.
- to do away with; erase; efface: to undo the havoc done by the storm.
- to bring to ruin or disaster; destroy: In the end his lies undid him.
- to unfasten by releasing: to undo a gate; to undo a button.
- to untie or loose (a knot, rope, etc.).
- to open (a package, wrapping, etc.).
- Archaic. to explain; interpret.
Origin of undo
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for undid
We undid it and hung it up in the kitchen, right next to a Nancy Newsom ham, the smell absolutely intoxicating.Easter's Top Five Hams
March 30, 2010
Panting, she undid the scarf and flooded the room with light.
The Prince stood by the window and undid the packet with trembling hands.
She took down the parcel from the shelf and undid the string.One Day's Courtship
Juve relighted the lamp, and undid the black serge covering of the bundle.A Nest of Spies
He undid the wrapping of the lawyer's letter and, as he read, the blood went from his face.Murder Point
- the past tense of undo
- (also intr) to untie, unwrap, or open or become untied, unwrapped, etc
- to reverse the effects of
- to cause the downfall of
- obsolete to explain or solve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for undid
Online Etymology Dictionary, © 2010 Douglas Harper