1. A state of depression
   "he had a bad case of the vapors";
   - blues, blue devils [archaic], megrims, vapours [Brit, Cdn]

1. A visible suspension in the air of particles of some substance
   "The vapor from the chemical reaction filled the laboratory";
   - vapour [Brit, Cdn]
    
2. The process of becoming a vapor
   "The rapid vapor of the liquid nitrogen created a fog-like effect";
   - vaporization, vaporisation [Brit], vapour [Brit, Cdn], evaporation

1. Speak (about unimportant matters) rapidly and incessantly
   "The old man vapored on about the weather";
   - chatter, piffle [informal], palaver [informal], prate, tittle-tattle, twaddle [informal], clack [informal], maunder, prattle, blab [informal], gibber, tattle, blabber [informal], gabble, vapour [Brit, Cdn], rabbit [Brit, informal], jibber-jabber, witter [Brit, informal], twattle [UK, dialect], yatter [Brit, informal], yabber [informal]
    
2. Become or emit vapor
   "The liquid began to vapor as it heated up";
   - vapour [N. Amer]

Type of: depression, mouth, phase change, phase transition, physical change, speak, state change, suspension, talk, utter, verbalise [Brit], verbalize

Encyclopedia: Vapors