The Collaborative International Dictionary of English v.0.48:

Capitalize \Cap"i*tal*ize\ (k[a^]p"[i^]*tal*[imac]z), v. t.
   [imp. & p. p. Capitalized (k[a^]p"[i^]*tal*[imac]zd); p.
   pr. & vb. n. Capitalizing.]
   1. To convert into capital, or to use as capital.
      [1913 Webster]

   2. To compute, appraise, or assess the capital value of (a
      patent right, an annuity, etc.)
      [1913 Webster]

   3. To print in capital letters, or with an initial capital.
      [1913 Webster]

   4. To supply capital for (an enterprise), especially by
      selling capital stock.
      [PJC]