Source : Webster's Revised Unabridged Dictionary (1913)

Expiry \Ex"pi*ry\, n.
   Expiration.

         He had to leave at the expiry of the term. --Lamb.

         The Parliament . . . now approaching the expiry of its
         legal term.                              --J. Morley.

Source : WordNet®

expiry
     n : a coming to an end of a contract period; "the expiry of his
         driver's license" [syn: {termination}, {expiration}]