A louver -LRB- American English -RRB- or louvre -LRB- British English -RRB-, from the French l'ouvert ; '' the open one '' -RRB- is a window, blind or shutter with horizontal slats that are angled to admit light and air, but to keep out rain, direct sunshine, and noise.
A louver -LRB- American English -RRB- or louvre -LRB- British English -RRB-, from the French l'ouvert ; '' the open one '' -RRB- is a window, blind or shutter with horizontal or, less often, vertical slats. They are angled to allow light and air in.