Search Result for "impermeable": 
Wordnet 3.0

ADJECTIVE (1)

1. preventing especially liquids to pass or diffuse through;
- Example: "impermeable stone"
- Example: "an impermeable layer of scum"
- Example: "a coat impermeable to rain"



The Collaborative International Dictionary of English v.0.48:

Impermeable \Im*per"me*a*ble\, a. [Pref. im- not + permeable:
   cf. F. imperm['e]able, L. impermeabilis.]
   Not permeable; not permitting passage, as of a fluid. through
   its substance; impervious; impenetrable; as, India rubber is
   impermeable to water and to air. -- Im*per"me*a*ble*ness,
   n. -- Im*per"me*a*bly, adv.
   [1913 Webster]


WordNet (r) 3.0 (2006):

impermeable
    adj 1: preventing especially liquids to pass or diffuse through;
           "impermeable stone"; "an impermeable layer of scum"; "a
           coat impermeable to rain" [ant: permeable]