GNU Collaborative International Dictionary of English

Found one definition

1.       
   Prolong , v. t. [imp. & p. p. Prolonged ; p. pr. & vb. n. Prolonging.] [F. prolonger, L. prolongare; pro before, forth + longus long. See Long, a., and cf. Prolongate, Purloin. ]
   1913 Webster
   To extend in space or length; as, to prolong a line.
   1913 Webster
   To lengthen in time; to extend the duration of; to draw out; to continue; as, to prolong one's days.
   1913 Webster
   Prolong awhile the traitor's life.
   Shak.
   
   1913 Webster
   The unhappy queen with talk prolonged the night.
   Dryden.
   
   1913 Webster
   To put off to a distant time; to postpone.
   Shak.
   
   1913 Webster