'Exertion' definitions:

Definition of 'exertion'

From: WordNet
noun
Use of physical or mental energy; hard work; "he got an A for effort"; "they managed only with great exertion" [syn: effort, elbow grease, exertion, travail, sweat]

Definition of 'Exertion'

From: GCIDE
  • Exertion \Ex*er"tion\, n. The act of exerting, or putting into motion or action; the active exercise of any power or faculty; an effort, esp. a laborious or perceptible effort; as, an exertion of strength or power; an exertion of the limbs or of the mind; it is an exertion for him to move, to-day.
  • Syn: Attempt; endeavor; effort; essay; trial. See Attempt. [1913 Webster]