noun any one of several species of ground squirrels or gophers of the genus spermophilus; also, the prairie dog.
2. marmot ·noun any rodent of the genus arctomys. the common european marmot (a. marmotta) is about the size of a rabbit, and inhabits the higher regions of the alps and pyrenees. the bobac is another european species. the common american species (a. monax) is the woodchuck.