Definition of borer

• n. - One that bores; an instrument for boring.
• n. - A marine, bivalve mollusk, of the genus Teredo and allies, which burrows in wood. See Teredo.
• n. - Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances.
• n. - One of the larvae of many species of insects, which penetrate trees, as the apple, peach, pine, etc. See Apple borer, under Apple.
• n. - The hagfish (Myxine).
• n. - One that bores; an instrument for boring.
• n. - A marine, bivalve mollusk, of the genus Teredo and allies, which burrows in wood. See Teredo.
• n. - Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances.
• n. - One of the larvae of many species of insects, which penetrate trees, as the apple, peach, pine, etc. See Apple borer, under Apple.
• n. - The hagfish (Myxine).