Wellington boot

noun
1.
a leather boot with the front part of the top extending above the knee.
2.
a rubber or water-repellent leather boot extending to the knee or somewhat below it.
Also, wellington boot.
Also called Wellington, wellington.
Origin
1810-20; after the 1st Duke of Wellington
British Dictionary definitions for wellington boots

Wellington boots

plural noun
1.
(Brit) Also called gumboots, wellingtons. knee-length or calf-length rubber or rubberized boots, worn esp in wet conditions Often shortened to wellies
2.
military leather boots covering the front of the knee but cut away at the back to allow easier bending of the knee
Word Origin
C19: named after the 1st Duke of Wellington2