'Miasma' definitions:

Definition of 'miasma'

From: WordNet
noun
An unwholesome atmosphere; "the novel spun a miasma of death and decay" [syn: miasma, miasm]
noun
Unhealthy vapors rising from the ground or other sources; "the miasma of the marshes"; "a miasma of cigar smoke" [syn: miasma, miasm]

Definition of 'Miasma'

From: GCIDE
  • Miasma \Mi*as"ma\, n.; pl. Miasmata. [NL., fr. Gr. ? defilement, fr. ? to pollute.] Infectious particles or germs floating in the air; air made noxious by the presence of such particles or germs; noxious effluvia; malaria. [1913 Webster]

Synonyms of 'miasma'

From: Moby Thesaurus