n. & v.
n. a hole or tunnel dug by a small animal, esp. a rabbit, as a dwelling.
v. 1 intr. make or live in a burrow. 2 tr. make (a hole etc.) by digging. 3 intr. hide oneself. 4 intr. (foll. by into) investigate, search. burrower n.
[ ME, app. var. of BOROUGH ]