Any of various small to medium-sized nocturnal arboreal marsupials of the order Phalangeriformes native to Australia, New Zealand and nearby islands, especially the common brushtail possum.
We could hear a possum scrambling across the roof during the night.
(North American, informal) Short for opossum; any marsupial of the family Didelphidae native to the Americas, noted for feigning death when threatened.
A possum was rummaging through the garbage cans behind the house.
