verb (used with object)
, undid, undone, undoing.
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.