Air infected with some noxious substance capable of
engendering disease; esp., an unhealthy exhalation from certain soils,
as marshy or wet lands, producing fevers; miasma.
1. Abounding in shelves; full of dangerous shallows. "A shelfy coast." Dryden. 2. Full of strata of rock. [Obs.] The tillable fields are in some places . . . so shelfy that the corn hath much ado to fasten its root....
