damp

noun4

1. •
   Moisture; humidity; dampness.

   • Ere twice in murk and occidental damp / Moist Hesperus hath quench’d his sleepy lamp, — 1604
2. •
   (no longer used) Dejection or depression; something that spoils a positive emotion (such as enjoyment, satisfaction, expectation or courage) or a desired activity.

   • Ev’n now, while thus I stand blest in thy Presence, / A secret Damp of Grief comes o’er my Thoughts, — 1712
3. •
   (no longer used) A gaseous product, formed in coal mines, old wells, pits, etc.
4. •
   (no longer used) Fog; fogginess; vapor.

   • Night […] with black air / Accompanied, with damps and dreadful gloom. — 1667

adjective3

1. •
   In a state between dry and wet; moderately wet; moist.

   • 25 January 2017, Leena Camadoo writing in The Guardian, Dominican banana producers at sharp end of climate change Once the farms have been drained and the dead plants have been cut down and cleared, farmers then have to be alert for signs of black sigatoka, a devastating fungus which flourishes in damp conditions and can destroy banana farms.
   • The lawn was still damp so we decided not to sit down.
2. •
   (figurative) Despondent; dispirited, downcast.

   • 27 July 2016, Jane O’Faherty in The Irish Independent, Monarchs and prison officers win big on second race day Though Travis's 'Why does it always Rain on Me' boomed around the stands, there were few damp spirits in Galway on day two of the races.
3. •
   Permitting the possession of alcoholic beverages, but not their sale.

verb3

1. •
   To suppress vibrations (mechanical) or oscillations (electrical) by converting energy to heat (or some other form of energy).

   • Hydraulic shock absorbers are used to damp out vertical and lateral oscillations. — 1960
2. •
   To put out, as fire; to weaken, restrain, or make dull.

   • How many a day has been damped and darkened by an angry word! — 1887
3. •
   To dampen; to make moderately wet.

   • It just damps a bit, but it een't not to sey reen. — 1890

noun2

1. •
   Initialism of damage-associated molecular pattern.
2. •
   Acronym of deficits in attention, motor control and perception.