1. A cavity, natural or artificial; an unfilled space within anything; a hole, a cavern; an excavation; as the hollow of the hand or of a tree.

2. A low spot surrounded by elevations; a depressed part of a surface; a concavity; a channel. Forests grew upon the barren hollows. (Prior) I hate the dreadful hollow behind the little wood. (Tennyson)

1. Having an empty space or cavity, natural or artificial, within a solid substance; not solid; excavated in the interior; as, a hollow tree; a hollow sphere. Hollow with boards shalt thou make it. (ex. Xxvii. 8)

2. Depressed; concave; gaunt; sunken. With hollow eye and wrinkled brow. (Shak)

3. Reverberated from a cavity, or resembling such a sound; deep; muffled; as, a hollow roar.

4. Not sincere or faithful; false; deceitful; not sound; as, a hollow heart; a hollow friend. Hollow newel, a pier of stone or brick made behind the lock gates of a canal, and containing a hollow or recess to receive the ends of the gates. Hollow root.

(Science: botany) see moschatel. Hollow square. See square. Hollow ware, hollow vessels; a trade name for cast-iron kitchen utensils, earthenware, etc.

Synonym: concave, sunken, low, vacant, empty, void, false, faithless, deceitful, treacherous.

Origin: oe. Holow, holgh, holf, as. Holh a hollow, hole. Cf. Hole.

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