Definify.com

Webster 1828 Edition

agonistic ‎(comparative more agonistic, superlative most agonistic)

Of or relating to contests that were originally participated in by the Ancient Greeks; athletic.
(zoology, anthropology) Characterised by conflict or hostility.
- 2006, Karen Armstrong, The Great Transformation, Atlantic Books 2007, p. 66:
  This was clearly such an event, but like the ancient religion of Israel, it was also deeply agonistic.
(rhetoric) Argumentative, combative.
(pharmacology) Pertaining to an agonist.

characterised by conflict or hostility