1. 
[syn: motivative(a), motive(a), motivating]
The Collaborative International Dictionary of English v.0.48:
motivating \motivating\ motivative \motivative\adj.
   causing motion or impelling to action; providing a motive[2];
   as, motivating arguments.
   Syn: motive(prenominal).
        [WordNet 1.5]
              It may well be that ethical language has primarily
              a motivative function               --Arthur Pap
WordNet (r) 3.0 (2006):
motivative
    adj 1: impelling to action; "it may well be that ethical
           language has primarily a motivative function"- Arthur
           Pap; "motive pleas"; "motivating arguments" [syn:
           motivative(a), motive(a), motivating]