To make something noticeable or conspicuous. The bright colors signalized the entrance to the festival.
To mark or indicate something with a signal. The lighthouse signalized the presence of dangerous rocks to passing ships.
To communicate or convey a message through signals. The referee signalized the end of the match with a whistle.
To distinguish or make notable; to celebrate or single out for special recognition, often used reflexively. The young officer signalized himself by acts of exceptional bravery.