Search Result for "unreliable": 
Wordnet 3.0

ADJECTIVE (4)

1. liable to be erroneous or misleading;
- Example: "an undependable generalization"
[syn: undependable, unreliable]

2. not worthy of reliance or trust;
- Example: "in the early 1950s computers were large and expensive and unreliable"
- Example: "an undependable assistant"
[syn: unreliable, undependable]

3. dangerously unstable and unpredictable;
- Example: "treacherous winding roads"
- Example: "an unreliable trestle"
[syn: treacherous, unreliable]

4. lacking a sense of responsibility; 



The Collaborative International Dictionary of English v.0.48:

Unreliable \Un`re*li"a*ble\, a.
   Not reliable; untrustworthy. See Reliable. --
   Un`re*li"a*ble*ness, n.
   [1913 Webster]

         Alcibiades . . . was too unsteady, and (according to
         Mr. Coleridge's coinage) "unreliable;" or perhaps, in
         more correct English, too "unrelyuponable." --De
                                                  Quincey.
   [1913 Webster]


WordNet (r) 3.0 (2006):

unreliable
    adj 1: liable to be erroneous or misleading; "an undependable
           generalization" [syn: undependable, unreliable]
    2: not worthy of reliance or trust; "in the early 1950s
       computers were large and expensive and unreliable"; "an
       undependable assistant" [syn: unreliable, undependable]
       [ant: dependable, reliable]
    3: dangerously unstable and unpredictable; "treacherous winding
       roads"; "an unreliable trestle" [syn: treacherous,
       unreliable]
    4: lacking a sense of responsibility