WordWeb Online

1. An unwholesome atmosphere
   "the novel spun a miasma of death and decay"
   - miasm
    
2. Unhealthy vapours rising from the ground or other sources
   "the miasma of the marshes"; "a miasma of cigar smoke"
   - miasm

Derived forms: miasmas, miasmata

See also: miasmic

Type of: air pollution, ambiance, ambience, atmosphere

Encyclopedia: Miasma