D defs.my
Entry 1 sense Webster, 1913

Waistcoat

/wās(t)'-kōt/ · Waist·coat · IPA /ˈweɪs(t)kəʊt/
01 n. A short, sleeveless coat or garment for men, worn under the coat, extending no lower than the hips, and covering the waist; a vest.
  1. 1.
    A short, sleeveless coat or garment for men, worn under the coat, extending no lower than the hips, and covering the waist; a vest.
Syn. See Vest.