\Dey\, n. [See {Dairy}.]
A servant who has charge of the dairy; a dairymaid. [Obs.]
--Chaucer.

\Dey\, n.; pl. {Deys}. [Turk. d[=a]i, orig., a maternal
uncle, then a friendly title formerly given to middle-aged or
old people, especially among the Janizaries; and hence, in
Algiers, consecrated at length to the commanding officer of
that corps, who frequently became afterward pasha or regent
of that province; hence the European misnomer of dey, as
applied to the latter: cf. F. dey.]
The governor of Algiers; -- so called before the French
conquest in 1830.