rave (Verb) — Participate in an all-night techno dance party.
rave (Verb) — Talk in a noisy, excited, or declamatory manner.
rave (Verb) — Praise enthusiastically. ex. "She raved about that new restaurant"
rave (Noun) — A dance party that lasts all night and electronically synthesized music is played. ex. "raves are very popular in Berlin"
rave (Noun) — An extravagantly enthusiastic review. ex. "he gave it a rave"