noun
- a dormer window that projects from a sloping roof
Usage: architecture
Examples
- The old farmhouse featured several lutherns along its steep roof.
- Light streamed through the luthern into the attic bedroom.
- The architect added a luthern to provide natural lighting for the upper floor.
- Workers installed new shingles around each luthern on the cottage roof.
- The luthern’s small window offered a view of the garden below.