Definitions

1. noun

A noxious or disease-causing atmosphere, especially one thought to be caused by the action of disease-causing organisms in the air.

“The doctor warned the villagers of the miasm in their neighborhood and advised them to avoid it.”

2. noun

A type of disease-causing or noxious atmosphere, especially one that is thought to be caused by the action of disease-causing organisms in the air.

“The scientist studied the miasm that was causing the spread of the disease in the nearby town.”