• (America) IPA: /ˈdɔɹmɚ/
• (RP) IPA: /ˈdɔːmə(ɹ)/

From Middle French dormoir, from dormir ("to sleep").

dormer (plural dormers)

1. (architecture) A room-like, roofed projection from a sloping roof.
   • 1904 May, Winston Churchill, “The Strange City”, in The Crossing, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd., →OCLC ↗, book II (Flotsam and Jetsam), page 371 ↗:

     Then we came to a high white wall that surrounded a large garden, and within it was a long, massive building of some beauty and pretension, with a high, latticed belfry and heavy walls and with arched dormers in the sloping roof.

2. (architecture) Ellipsis of dormer-window.

• German: Dachgaube
• Italian: abbaìno

From dorm + -er.

dormer (plural dormers)

1. (Philippines) A resident of a dormitory.

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.

• IPA: /ˈdɔː(ɹ)mə(ɹ)/

1. Surname.