Definify.com
Webster 1913 Edition
Polka
Pol′ka
,Noun.
[Pol.
Polka
a Polish woman: cf. F. & G. polka
.] 1.
A dance of Polish origin, but now common everywhere. It is performed by two persons in common time.
2.
(Mus.)
A lively Bohemian or Polish dance tune in 2-4 measure, with the third quaver accented.
Polka jacket
, a kind of knit jacket worn by women.