Source : Webster's Revised Unabridged Dictionary (1913)

Pluralize \Plu"ral*ize\, v. t. [imp. & p. p. {Pluralized}; p.
   pr. & vb. n. {Pluralizing}.]
   1. To make plural by using the plural termination; to
      attribute plurality to; to express in the plural form.

   2. To multiply; to make manifold. [R.]