A woman undoing her boots.
- An example of undo is unzipping a dress in order to take it off.
- An example of undo is a drug addict using drugs after being sober for many years.
- An example of undo is bringing disgrace to a formerly well-thought of family.
transitive verb-·did′, -·done′, -·do′ing
- to release or untie (a fastening)
- to open (a parcel, door, etc.) by this means
- to reverse the doing of (something accomplished); do away with; cancel; annul
- to put an end to; bring to ruin, disgrace, or downfall
- to upset emotionally; perturb
- Obs. to interpret; explain
Origin of undoMiddle English undon from Old English from un-, un- + don, to do
verbun·did, un·done, un·do·ing, un·does,
- To reverse or erase; annul: impossible to undo the suffering caused by the war.
- To untie, disassemble, or loosen: undo a shoelace.
- To open (a parcel, for example); unwrap.
- a. To cause the ruin or downfall of; destroy.b. To throw into confusion; unsettle.
(third-person singular simple present undoes, present participle undoing, simple past undid, past participle undone)
un- +"Ž do
undo - Computer Definition
To restore the last editing operation that has taken place. For example, if a segment of text has been deleted or changed, performing an undo will restore the original text. Programs may have several levels of undo, including being able to reconstruct the original data for all edits performed in the current session. See redo and undo send.