#1 emit v. [breathe, pass off] expel (gases or odors). wn
#2 emit v. [give out, give off] give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.; "The ozone layer blocks some harmful rays which the sun emits". wn
#3 emit v. [utter, let out, let loose] express audibly; utter sounds (not necessarily words); "She let out a big heavy sigh"; "He uttered strange sounds that nobody could understand". wn
vizzz