'Infinitival' definitions:

Definition of 'infinitival'

From: WordNet
adjective
Relating to or formed with the infinitive; "infinitival clause"

Definition of 'Infinitival'

From: GCIDE
  • Infinitival \In*fin`i*ti"val\, a. Pertaining to the infinite mood. "Infinitival stems." --Fitzed. Hall. [1913 Webster]