D defs.my
Entry 1 sense Webster, 1913

Batement

· Bate·ment · IPA
01 n. Abatement; diminution.
  1. 1.
    Abatement; diminution.
Phrases & compounds
Batement light — a window or one division of a window having vertical sides, but with the sill not horizontal, as where it follows the rake of a staircase.