The definition of a mush is a soft mashed up food substance, especially porridge, or a trip across snow in a sled pulled by dogs.(noun)
Mush means to crush or mash up, or to travel through the snow with a dog sled.(verb)
Mush is defined as a word used to tell sled dogs to move faster.(interjection)
An example of mush used as an interjection is in the sentence, "Mush! We are running late!"
See mush in Webster's New World College Dictionary
Origin: prob. var. of mash
Origin: prob. < mush on, altered < Fr marchons, let's go < marcher, to go, march
See mush in American Heritage Dictionary 4
Origin: Probably alteration of mash.
verb mushed, mush·ing, mush·es verb, intransitive
Origin: Possibly alteration of French marchons
Origin: , first person pl. imperative of marcher, to walk, go
Origin: , from Old French; see march1.
Learn more about mush