Undo definition

Undo

Topics Undo Definition

WordNet

(1) Remove the outer cover or wrapping of

"Let's unwrap the gifts!"

"Undo the parcel"

(2) Cause to become loose

"Undo the shoelace"

"Untie the knot"

"Loosen the necktie"

(3) Cancel, annul, or reverse an action or its effect

"I wish I could undo my actions"

(4) Deprive of certain characteristics

(5) Cause the ruin or downfall of

"A single mistake undid the President and he had to resign"

WiktionaryText

To reverse the effects of an action.

Fortunately, we can undo most of the damage to the system.
To unfasten.

Could you undo my buckle for me?

sense 1

sense 2

sense 2