Wordnet 3.0
ADVERB (1)
1. 
 in a permissive manner; 
The Collaborative International Dictionary of English v.0.48:
Permissively \Per*mis"sive*ly\, adv.
   In a permissive manner.
   [1913 Webster]
WordNet (r) 3.0 (2006):
permissively
    adv 1: in a permissive manner