The Collaborative International Dictionary
Galoshe \Ga*loshe"\, n. Same as Galoche.
Galoche \Ga*loche"\, Galoshe \Ga*loshe"\, [OE. galoche, galache, galage, shoe, F. galoche galoche, perh. altered fr. L. gallica a Gallic shoe, or fr. LL. calopedia wooden shoe, or shoe with a wooden sole, Gr. ?, dim. of ?, ?, a shoemaker's last; ? wood + ? foot.]
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A clog or patten. [Obs.]
Nor were worthy [to] unbuckle his galoche.
--Chaucer. Hence: An overshoe worn in wet weather, especially a waterproof rubber overshoe extending over the ankle, worn over one's regular shoes; now usually written galosh. It is used mostly in the plural.
A gaiter, or legging, covering the upper part of the shoe and part of the leg.
Wiktionary
n. 1 (context obsolete English) A clog or patten. 2 Hence, an overshoe worn in wet weather. 3 A gaiter, or legging, covering the upper part of the shoe and part of the leg.