The Collaborative International Dictionary of English v.0.48:

Signalize \Sig"nal*ize\, v. t. [imp. & p. p. Signalized; p.
   pr. & vb. n. Signalizing.] [From Signal, a.]
   1. To make signal or eminent; to render distinguished from
      what is common; to distinguish.
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            It is this passion which drives men to all the ways
            we see in use of signalizing themselves. --Burke.
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   2. To communicate with by means of a signal; as, a ship
      signalizes its consort.
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   3. To indicate the existence, presence, or fact of, by a
      signal; as, to signalize the arrival of a steamer.
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