Definition of snag

• n. - 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.
• n. - A tooth projecting beyond the rest; contemptuously, a broken or decayed tooth.
• n. - 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.
• n. - One of the secondary branches of an antler.
• v. t. - To cut the snags or branches from, as the stem of a tree; to hew roughly.
• v. t. - To injure or destroy, as a steamboat or other vessel, by a snag, or projecting part of a sunken tree.