Source : Webster's Revised Unabridged Dictionary (1913)

Start-up \Start"-up`\, n.
   1. One who comes suddenly into notice; an upstart. [Obs.]
      --Shak.

   2. A kind of high rustic shoe. [Obs.] --Drayton.

            A startuppe, or clownish shoe.        --Spenser.

Start-up \Start"-up`\, a.
   Upstart. [R.] --Walpole.