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Definitions of undo

  1. cause to become loose; "undo the shoelace"; "untie the knot"; "loosen the necktie" Scrapingweb Dictionary DB
  2. cause the ruin or downfall of; "A single mistake undid the President and he had to resign" Scrapingweb Dictionary DB
  3. remove the outer cover or wrapping of; "Let's unwrap the gifts!"; "undo the parcel" Scrapingweb Dictionary DB
  4. cancel, annul, or reverse an action or its effect; "I wish I could undo my actions" Scrapingweb Dictionary DB
  5. deprive of certain characteristics Scrapingweb Dictionary DB
  6. To reverse, as what has been done; to annul; to bring to naught. Webster Dictionary DB
  7. To loose; to open; to take to piece; to unfasten; to untie; hence, to unravel; to solve; as, to undo a knot; to undo a puzzling question; to undo a riddle. Webster Dictionary DB
  8. To bring to poverty; to impoverish; to ruin, as in reputation, morals, hopes, or the like; as, many are undone by unavoidable losses, but more undo themselves by vices and dissipation, or by indolence. Webster Dictionary DB
  9. 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. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  10. Undid. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  11. Undone. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  12. Undoing. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  13. To reverse what has been done: to bring to naught: to loose: to open: to unravel: to impoverish: to ruin, as in reputation. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  14. To reverse what has been done; loose; open; ruin. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  15. To annul or counteract. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  16. To ruin. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  17. To loosen or untie. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  18. To reverse what has been done; to annul; to loose; to open; to take to pieces; to unravel; to untie; to ruin; to bring to poverty; to ruin morally; to ruin in reputation. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  19. To reverse what has been done; to annul; to loose; to unravel; to ruin. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  20. un-d[=oo]', v.t. to reverse what has been done: to bring to naught: to loose: to open: to unravel: to impoverish: to ruin, as in reputation: (Shak.) to leave undone.--ns. UNDO'ER; UNDO'ING, the reversal of what has been done: ruin.--adj. UNDONE', not done: ruined: untied, unfastened. gutenberg.org/ebooks/37683
  21. See un-( 1); undock, un-( 3); undoer, undoing, undomesticate, undone, un- (1) Concise Oxford Dictionary

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