Dictionary:

signalize

  (sĭg'nə-līz')

1. To make remarkable or conspicuous: a life signalized by high accomplishments.
2. To point out particularly.

verb

1. To make noticeable or different: characterize, differentiate, discriminate, distinguish, individualize, mark, set apart, singularize. See same/different/compare.
2. To cause to be eminent or recognized: distinguish, elevate, ennoble, exalt, honor. See respect/contempt/standing.
3. To make bodily motions so as to convey an idea or complement speech: gesticulate, gesture, motion, sign, signal. Idioms: give the high sign. See express.

The verb has 4 meanings:

Meaning #1: provide with traffic signals, as of an intersection
  Synonym: signalise

Meaning #2: communicate silently and non-verbally by signals or signs
  Synonyms: sign, signal, signalise

Meaning #3: point out carefully and clearly
  Synonyms: signalise, point out, call attention

Meaning #4: make conspicuous or noteworthy
  Synonyms: signalise, distinguish