The Collaborative International Dictionary of English v.0.48:
Applicability \Ap`pli*ca*bil"i*ty\, n. The quality of being applicable or fit to be applied. [1913 Webster]WordNet (r) 3.0 (2006):
applicability n 1: relevance by virtue of being applicable to the matter at hand [syn: applicability, pertinence, pertinency] [ant: inapplicability]