The Collaborative International Dictionary of English v.0.48:
Allusive \Al*lu"sive\, a. 1. Figurative; symbolical. [1913 Webster] 2. Having reference to something not fully expressed; containing an allusion. [1913 Webster]WordNet (r) 3.0 (2006):
allusive adj 1: characterized by indirect references; "allusive speech is characterized by allusions"