Etymology

dormer

D2O1R1M3E1R1

Today it means: A room-like, roofed projection from a sloping roof. Full definition →

Middle French dormoir
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dormer · noun1

  1. Middle French · derived fromdormoir“sleeping room”
  2. English todaydormer

From Middle French dormoir (“sleeping room”), from dormir (“to sleep”).

dormer · noun2

From dorm + -er.

Dormer · proper noun3

  1. Irish · derived fromÓ Díorma
  2. English todayDormer

Most probably an English habitational surname, but if so the place of origin has not been identified. It could also be a reduced Anglicized form of Irish Ó Díorma.

Etymology from Wiktionary, CC BY-SA 4.0.