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; a leaky faucet.
[1913 Webster]
2. Apt to disclose secrets; tattling; not close. [Colloq.]
[1913 Webster]
3. (Genetics) Retaining some function; not completely
inactivating the gene; as, substitution mutations are
sometimes leaky; -- of mutations.
[PJC]