IPA: /ˈluːθərn/
KK: /ˈluːθərn/
A type of window that is set into a sloping roof, often used to add light and space to an upper floor.
The architect designed a beautiful luthern to brighten the attic room.
The word 'luthern' originates from Old English 'lutherne', meaning 'of or pertaining to Martin Luther'. It refers specifically to the Protestant denomination that follows the teachings of Martin Luther.
Think of Martin Luther, the key figure in the Protestant Reformation, to remember that 'luthern' relates to his teachings and followers.