1. [N. Amer] Provide with traffic signals
   "signalize a busy intersection";
   - signalise [Brit]
    
2. Point out carefully and clearly
   "The teacher signalized the important passages";
   - signalise [Brit], point out, call attention
    
3. Make conspicuous or noteworthy
   "The event was signalized by fireworks";
   - signalise [Brit], distinguish
    
4. Communicate silently and non-verbally by signals or signs
   "The hikers signalized their location to the rescue helicopter";
   - sign, signal, signalise [Brit]

Derived forms: signalized, signalizing, signalizes

Type of: communicate, designate, furnish, indicate, intercommunicate, mark, offer, point, provide, render, show, supply