\Snag\, n. [Prov. E., n., a lump on a tree where a branch
has been cut off; v., to cut off the twigs and small branches
from a tree, of Celtic origin; cf. Gael. snaigh, snaidh, to
cut down, to prune, to sharpen, p. p. snaighte, snaidhte, cut
off, lopped, Ir. snaigh a hewing, cutting.]
1. A stump or base of a branch that has been lopped off; a
   short branch, or a sharp or rough branch; a knot; a
   protuberance.
         The coat of arms Now on a naked snag in triumph
         borne.                                --Dryden.
2. A tooth projecting beyond the rest; contemptuously, a
   broken or decayed tooth. --Prior.
3. A tree, or a branch of a tree, fixed in the bottom of a
   river or other navigable water, and rising nearly or quite
   to the surface, by which boats are sometimes pierced and
   sunk.
4. (Zo["o]l.) One of the secondary branches of an antler.
{Snag boat}, a steamboat fitted with apparatus for removing
   snags and other obstructions in navigable streams. [U.S.]
{Snag tooth}. Same as {Snag}, 2.
         How thy snag teeth stand orderly, Like stakes which
         strut by the water side.              --J. Cotgrave.

\Snag\, v. t. [imp. & p. p. {Snagged}; p. pr. & vb. n.
{Snagging}.]
1. To cut the snags or branches from, as the stem of a tree;
   to hew roughly. [Prov. Eng.] --Halliwell.
2. To injure or destroy, as a steamboat or other vessel, by a
   snag, or projecting part of a sunken tree. [U. S.]