Dictionary
undo
verb un·do \ˌən-ˈdü, ˈən-\
: to open or release (something) : to unfasten or loosen (something)
: to change or stop the effect of (something)
: to cause the failure of (someone or something)
un·did\-ˈdid\un·done\-ˈdən\un·do·ing\-ˈdü-iŋ\
Full Definition of UNDO
transitive verb
1
: to open or loose by releasing a fastening
2
: to make of no effect or as if not done : make null : reverse
3
intransitive verb
: to come open or apart
— un·do·er \-ˈdü-ər\ noun
See undo defined for English-language learners
See undo defined for kids
ADVERTISEMENT
First Known Use of UNDO
before 12th century
Related to UNDO
- Synonyms
- demoralize, emasculate, paralyze, unnerve, unman, unstring
- Antonyms
- nerve
Rhymes with UNDO
accrue, achoo, adieu, ado, Agnew, aircrew, airscrew, anew, askew, babu, Baku, bamboo, battu, battue, bayou, bedew, beshrew, bestrew, bijou, boo-boo, boubou, brand-new, breakthrough, burgoo, cachou, can-do, canoe, caoutchouc, Carew, Cebu, Chonju, construe, Corfu, corkscrew, coypu, CQ, cuckoo, curfew, debut, Depew, doo-doo, ecu, endue, ensue, eschew, floor-through, fondue, fordo, Gansu, Gentoo, Gifu, goo-goo, GQ, ground crew, gumshoe, guru, hairdo, hereto, Hindu, home brew, Honshu, horseshoe, how-to, HQ, Hutu, igloo, imbrue, imbue, IQ, jackscrew, K2, Kansu, karoo, Karoo, kazoo, Khufu, kung fu, Kwangju, leadscrew, lean-to, long view, make-do, Matthew, me-too, mildew, milieu, miscue, misdo, muumuu, non-U, old-shoe, one-two, on view, outdo, perdu, Peru, poilu, prau, preview, pursue, purview, ragout, redo, renew, Renfrew, review, revue, rough-hew, run-through, sandshoe, Sardou, see-through, set-to, setscrew, shampoo, sinew, skiddoo, snafu, snowshoe, soft-shoe, span-new, subdue, surtout, taboo, Taegu, tattoo, thank-you, thereto, thumbscrew, to-do, too-too, tree shrew, undue, unglue, unscrew, untrue, vatu, vendue, venue, virtu, voodoo, wahoo, walk-through, wherethrough, whereto, who's who, worldview, yahoo, yoo-hoo
UNDO Defined for Kids
undo
verb un·do \ˌən-ˈdü\
un·did \-ˈdid\un·done \-ˈdən\un·do·ing \-ˈdü-iŋ\un·does \-ˈdəz\
Definition of UNDO for Kids
2
: to cancel the effect of : reverse <The damage cannot be undone.>
3
: to cause the ruin or failure of <He was undone by greed.>
Learn More About UNDO
Browse
ADVERTISEMENT
Seen & Heard
What made you want to look up undo? Please tell us where you read or heard it (including the quote, if possible).