WordWeb Online

1. Give insider information or advise to
   "He tipped off the police about the terrorist plot";
   - tip

1. Inside information that something is going to happen
    
2. The act of starting a basketball game with a jump ball
   - tap-off

Derived forms: tips off, tipped off, tip-offs, tipping off

Type of: advise, counsel, information, jump ball, rede [archaic]

Part of: basketball, basketball game, hoops

Encyclopedia: Tip-off