The Collaborative International Dictionary of English v.0.48:

Lessee \Les*see"\ (l[e^]s*s[=e]"), n. [F. laiss['e], p. p. of
   laisser. See Lease, v. t.] (Law)
   The person to whom a lease is given, or who takes an estate
   by lease. --Blackstone.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lessee
    n 1: a tenant who holds a lease [syn: leaseholder, lessee]