Search Result for "navigability": 
Wordnet 3.0

NOUN (1)

1. the quality of being suitable for the passage of a ship or aircraft; 



The Collaborative International Dictionary of English v.0.48:

Navigability \Nav`i*ga*bil"i*ty\, n. [Cf. F. navigabilit['e].]
   The quality or condition of being navigable; navigableness.
   [1913 Webster]


WordNet (r) 3.0 (2006):

navigability
    n 1: the quality of being suitable for the passage of a ship or
         aircraft