Definitions of rave:

• noun:   an extravagantly enthusiastic review

  Example: "He gave it a rave"

• noun:   a dance party that lasts all night and electronically synthesized music is played

  Example: "Raves are very popular in Berlin"

• verb:   participate in an all-night techno dance party
• verb:   praise enthusiastically

  Example: "She raved about that new restaurant"

• verb:   talk in a noisy, excited, or declamatory manner
• name:  A surname (very rare: popularity rank in the U.S.: #29778)