Source : Webster's Revised Unabridged Dictionary (1913)

Entelechy \En*tel"e*chy\, n. [L. entelechia, Gr. ?, prob. fr. ?
   ? ? to be complete; ? + ? completion, end + ? to have or
   hold.] (Peripatetic Philos.)
   An actuality; a conception completely actualized, in
   distinction from mere potential existence.