noun

• (archaic, also figurative) A dose or draught of liquid medicine (especially one causing sleepiness) taken by a person; specifically, a (large) dose, or one forced or poured down the throat.
  "[T]hey need not carry ſuch an unvvorthy ſuſpicion over the Preachers of Gods vvord, as to tutor their unſoundneſſe vvith the Abcie of a Liturgy, or to diet their ignorance, and vvant of care, vvith the limited draught of a Mattin, and even ſong drench."
• (veterinary medicine) A dose or draught of liquid medicine administered to an animal.
  "O my ſvveet Harry ſaies ſhe! hovv manie haſt thou kild to day? Giue my roane horſe a drench (ſayes hee) and aunſvveres ſome foureteene, an houre after: a trifle, a trifle."

verb

• (transitive)
  "Pork ſucceeds to Beef, Pies to Puddings: The Cloth is remov'd, Madam, drench'd vvith a Bumper, drops a Courtſey, and departs; […]"
• (transitive)
• (transitive)
  "That our Garments being (as they were) drencht in the Sea, hold notwithſtanding their freſhneſſe and gloſſes, being rather new dy'de then ſtain'd with ſalte water."
• (transitive)
  "VVhat flames (q[uo]d he) vvhen I thee preſent ſee, / In daunger rather to be drent, then brent?"