dormouse UK /ˈdɔː.maʊs/US /ˈdɔɹ.maʊs/ noun4 •Any of several species of small, mostly European rodents of the family Gliridae.Restoration such as this must work around wildlife habitats, and NR came to discover that almost the entire line was a haven for dormice. — 2021 •Glis glis (edible dormouse). •(UK) Muscardinus avellanarius (hazel dormouse). •(figurative) A person who sleeps a great deal, or who falls asleep readily (by analogy with the sound hibernation of the dormouse). formsdormice