noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A skylight.
2. 2
   A sloping, box-like structure, flaring upward and open at the top, attached to a window on the outside, to prevent those within from seeing objects below, or for the purpose of directing light downward into the window.

Etymology

Borrowed from French abat-jour.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.