Search Result for "undo": 
Wordnet 3.0

VERB (5)

1. cancel, annul, or reverse an action or its effect;
- Example: "I wish I could undo my actions"

2. deprive of certain characteristics;
[syn: unmake, undo]

3. cause the ruin or downfall of;
- Example: "A single mistake undid the President and he had to resign"

4. cause to become loose;
- Example: "undo the shoelace"
- Example: "untie the knot"
- Example: "loosen the necktie"
[syn: untie, undo, loosen]

5. remove the outer cover or wrapping of;
- Example: "Let's unwrap the gifts!"
- Example: "undo the parcel"
[syn: unwrap, undo]



The Collaborative International Dictionary of English v.0.48:

Undo \Un*do"\, v. t. [AS. und?n. See 1st Un-, and Do to
   perform.]
   1. To reverse, as what has been done; to annul; to bring to
      naught.
      [1913 Webster]

            What's done can not be undone.        --Shak.
      [1913 Webster]

            To-morrow, ere the setting sun,
            She 'd all undo that she had done.    --Swift.
      [1913 Webster]

   2. 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. --Tennyson.
      [1913 Webster]

            Pray you, undo this button.           --Shak.
      [1913 Webster]

            She took the spindle, and undoing the thread
            gradually, measured it.               --Sir W.
                                                  Scott.
      [1913 Webster]

   3. 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.
      [1913 Webster]

            That quaffing and drinking will undo you, --Shak.
      [1913 Webster]


WordNet (r) 3.0 (2006):

undo
    v 1: cancel, annul, or reverse an action or its effect; "I wish
         I could undo my actions"
    2: deprive of certain characteristics [syn: unmake, undo]
       [ant: do, make]
    3: cause the ruin or downfall of; "A single mistake undid the
       President and he had to resign"
    4: cause to become loose; "undo the shoelace"; "untie the knot";
       "loosen the necktie" [syn: untie, undo, loosen]
    5: remove the outer cover or wrapping of; "Let's unwrap the
       gifts!"; "undo the parcel" [syn: unwrap, undo] [ant:
       wrap, wrap up]