The Collaborative International Dictionary of English v.0.48:

Bracket \Brack"et\, v. t. [imp. & p. p. Bracketed; p. pr. &
   vb. n. Bracketing]
   1. To place within brackets; to connect by brackets; to
      furnish with brackets.
      [1913 Webster]

   2. (Gunnery) To shoot so as to establish a bracket for (an
      object).
      [Webster 1913 Suppl.]