The Collaborative International Dictionary of English v.0.48:

Romanize \Ro"man*ize\, v. t. [imp. & p. p. Romanized; p. pr. &
   vb. n. Romanizing.]
   1. To Latinize; to fill with Latin words or idioms. [R.]
      --Dryden.
      [1913 Webster]

   2. To convert to the Roman Catholic religion.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Romanize \Ro"man*ize\, v. i.
   1. To use Latin words and idioms. "Apishly Romanizing."
      --Milton.
      [1913 Webster]

   2. To conform to Roman Catholic opinions, customs, or modes
      of speech.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Romanize
    v 1: write in the Latin alphabet; "many shops in Japan now carry
         neon signs with Romanized names" [syn: Romanize,
         Romanise, Latinize, Latinise]