damp

damp is a Noun

Definition:

[1] Moisture; humidity; fog; fogginess; vapor. Night . . . with black air Accompanied, with damps and dreadful gloom. Milton.

[2] Dejection; depression; cloud of the mind. Even now, while thus I stand blest in thy presence, A secret damp of grief comes o`er my soul. Addison. It must have thrown a damp over your autumn excursion. J. D. Forbes.

[3] A gaseous prodact, formed in coal mines, old wells, pints, etc. Choke damp, a damp consisting principally of carboniCarbonic acid, under Carbonic. -- Damp sheet, a curtain in a mine gallery to direct air currents and prevent accumulation of gas. -- Fire damp, a damp consisting chiefly of light carbureted hydrogen; -- so called from its tendence to explode when mixed with atmospheric air and brought into contact with flame.