Source : Webster's Revised Unabridged Dictionary (1913)

Ignite \Ig*nite"\, v. t. [imp. & p. p. {Ignited}; p. pr. & vb.
   n. {Igniting}.] [L. ignitus, p. p. of ignire to ignite, fr.
   ignis fire. See {Igneous}.]
   1. To kindle or set on fire; as, to ignite paper or wood.

   2. (Chem.) To subject to the action of intense heat; to heat
      strongly; -- often said of incombustible or infusible
      substances; as, to ignite iron or platinum.