1) An act of worship 1) Effort 2) Use 
putting into practice; exercise
• (n.) exercise; practice; use.
Ex·er`ci·ta'tion noun [ Latin exercitatio , from exercitare , intense., from exercere to exercise: Confer f. exercitation .] exercise; practice; use. [ R.] Sir T. Browne. 
exercise or exertion, as of the faculties or powers of the body or mind: an exercitation of the imagination. · practice or training: exercitations in logical thinking. · the performance of a religious observance; an act of worship. · a disquisition or discourse performed as a display of skill.