I. ˈdäpə(r) noun
( -s )
Etymology: Middle English, from doppen to dop, dive + -er — more at dop
: any of certain diving birds (as a dabchick or bufflehead)
II. noun
( -s )
Usage: usually capitalized
Etymology: Afrikaans, from 16th century Dutch, from dop, a kind of hat, literally, shell, pot (from Middle Dutch dop, doppe shell, goblet, pot) + -er — more at dop
: a member of a rigidly Calvinistic sect of Afrikaners