The Collaborative International Dictionary of English v.0.48:
Provisory \Pro*vi"so*ry\, a. [Cf. F. provisoire.] 1. Of the nature of a proviso; containing a proviso or condition; conditional; as, a provisory clause. [1913 Webster] 2. Making temporary provision; provisional. [1913 Webster]WordNet (r) 3.0 (2006):
provisory adj 1: subject to a proviso; "a provisory clause"