DictionarylouverVentilation slats
noun / verb

louver

LOO-ver/ˈluvər/

An angled ventilation slat or vent, or to fit something with these.

The angled louvers let fresh air in while keeping rain out.

A close three-quarter cutaway view of a wall louver: overlapping downward-sloping slats shed exterior rain while leaving clear, open air passages into the dry interior.
Etymology

Old French lovier has an uncertain deeper origin. The English word first named a rooftop structure that dispersed smoke and admitted light, then overlapping slats that let air through while keeping rain out.

In context

HouseMaster's Carpentry0:01
a custommade louver vent
How to Build Custom Gable End Louver Vents from Cedar

More examples

  • A small louver provides ventilation near the top of the door.
  • Dust collects along the louvers in the attic vent.
  • We louver the cabinet doors to keep the electronics cool.

Forms

louver · louvers · louvered · louvering

Similar words

vent
Any opening for airflow; need not contain angled slats.
grille
A covering of bars or mesh, not necessarily angled slats.