1. a primitive stone mill for grinding corn by hand;
The Collaborative International Dictionary of English v.0.48:
Quern \Quern\, n. [AS. cweorn, cwyrn; akin to D. kweern, OHG.
quirn, Icel. kvern, Sw. qvarn, Dan. qu[ae]rn, Goth. qairnus
(in asiluqa['i]rnus), Lith. q[`i]rnos, and perh. E. corn.]
A mill for grinding grain, the upper stone of which was
turned by hand; -- used before the invention of windmills and
They made him at the querne grind. --Chaucer.
WordNet (r) 3.0 (2006):
n 1: a primitive stone mill for grinding corn by hand