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Want to find out what does the word undo mean? We gathered all the possible definitions of the word undo on our website. Our definition dictionary is updated all the time with new definitions and is ready to help you.

undo

Part of speech: Verb

To make null and void; to make of no effect; to act upon in a way contrary to previous action; as, to undo all the work; to destroy; to loosen, as a knot.

Part of speech: Past tense

Undid.

Part of speech: Participle

Undone.

Part of speech: Participle

Undoing.

Usage examples "undo":