Source : Webster's Revised Unabridged Dictionary (1913)

Betime \Be*time"\, Betimes \Be*times"\, adv. [Pref. be- (for by)
   + time; that is, by the proper time. The -s is an adverbial
   ending.]
   1. In good season or time; before it is late; seasonably;
      early.

            To measure life learn thou betimes.   --Milton.

            To rise betimes is often harder than to do all the
            day's work.                           --Barrow.

   2. In a short time; soon; speedily; forth with.

            He tires betimes that spurs too fast betimes.
                                                  --Shak.