- any of various small, arboreal, chiefly nocturnal mammals of the superfamily Lemuroidea, inhabiting Madagascar and the Comoro Islands, inclusive of nearly 100 species, most of which have large eyes, a foxlike face, and woolly fur: lemurs, which vary significantly in size, include the world’s smallest primates.
- any Madagascan prosimian primate of the family Lemuridae, such as Lemur catta (the ring-tailed lemur). They are typically arboreal, having foxy faces and long tails
- any similar or closely related animal, such as a loris or indris
