The Collaborative International Dictionary of English v.0.48:

Gear \Gear\ (g[=e]r) v. t. [imp. & p. p. Geared (g[=e]rd); p.
   pr. & vb. n. Gearing.]
   1. To dress; to put gear on; to harness.
      [1913 Webster]

   2. (Mach.) To provide with gearing.
      [1913 Webster]

   3. To adapt toward some specific purpose; as, they geared
      their advertising for maximum effect among teenagers.
      [PJC]

   Double geared, driven through twofold compound gearing, to
      increase the force or speed; -- said of a machine.
      [1913 Webster]