D defs.my
Entry 2 senses Webster, 1913

Pest

/pĕst/ · IPA /pɛst/
01 n. A fatal epidemic disease; a pestilence; specif., the plague.
  1. 1.
    A fatal epidemic disease; a pestilence; specif., the plague.
    “England's sufferings by that scourge, the pest.” Cowper.
  2. 2.
    Anything which resembles a pest; one who, or that which, is troublesome, noxious, mischievous, or destructive; a nuisance.