1. a waterproof overshoe, typically made of rubber.
Word OriginMiddle English (denoting a type of clog): via Old French from late Latin gallicula, diminutive of Latin gallica (solea) ‘Gallic (shoe)’. The current sense dates from the mid 19th century.
Galoshes, also known by many other names, are a type of overshoe or rubber boot that is put on over shoes to keep them from getting muddy or wet during inclement weather. Wikipedia