Definition: leaky

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Source: WordNet (r) 1.7 

leaky
     adj 1: permitting leaks or leakage; "a leaky roof"; "a leaky
            defense system" [ant: tight]
     2: (of ships and boats) permitting leakage [syn: leaking]
     3: permitting liquids to penetrate; "a tarpaulin too leaky to
        be of much use"
     4: used informally; unable to retain urine
     5: prone to communicate confidential information [syn: blabbermouthed,
         talebearing, tattling]

Source: Webster's Revised Unabridged Dictionary (1913) 

Leaky \Leak"y\, a. [Compar. Leakier; superl. Leakiest.]
   1. Permitting water or other fluid to leak in or out; as, a
      leaky roof or cask.

   2. Apt to disclose secrets; tattling; not close. [Colloq.]