The Collaborative International Dictionary of English v.0.48:
Burrow \Bur"row\, v. i. [imp. & p. p. Burrowed; p. pr. & vb.
1. To excavate a hole to lodge in, as in the earth; to lodge
in a hole excavated in the earth, as conies or rabbits.
2. To lodge, or take refuge, in any deep or concealed place;
Sir, this vermin of court reporters, when they are
forced into day upon one point, are sure to burrow
in another. --Burke.
Burrowing owl (Zool.), a small owl of the western part of
North America (Speotyto cunicularia), which lives in
holes, often in company with the prairie dog.