To be slow, dull, or inert; be lazy; lie abed: said of persons or of things.To make sluggish.To hinder; retard.Slow; sluggish.n. A slow, heavy, lazy fellow; a sluggard; a slow-moving animal.n. Hence Any slow-moving thing.n. A hindrance; an obstruction.n. A terrestrial pulmonate gastropod of one of the families Limacidæ and Arionidæ and related ones, which has only a rudimentary shell, if any.n. Some or any slug-like soft-bodied insect or its larva; a grub: as, the yellow-spotted willow-slug, the larva of a saw-fly, Nematus ventralis. See pear-slug, rose-slug, slug-caterpillar, slug-worm.n. The trepang or sea-cucumber; any edible holothurian; a sea-slug.To strike heavily. Compare slugger.n. A heavy or forcible blow; a hard hit.n. A rather heavy piece of crude metal, frequently rounded in form.n. Specifically— A bullet not regularly formed and truly spherical, such as were frequently used with smooth-bore guns or old-fashioned rifies. These were sometimes hammered, sometimes chewed into an approximately spherical form.n. Hence— Any projectile of irregular shape, as one of the pieces constituting mitraillen. A thick blank of typemetal made to separate lines of print and to show a line of white space; also, such a piece with a number or word, to be used temporarily as a direction or marking for any purpose, as in newspaper composing-rooms the distinctive number placed at the beginning of a compositor's “take,” to mark it as his work. Thin blanks are known as leads. All blanks thicker than one sixteenth of an inch are known as slugs, and are called by the names of their proper typebodies: as, nonpareil slugs; pica slugsn. A stunted horn. Compare scur.To load with a slug or slugs, as a gun.In gunnery, to assume the sectional shape of the bore when fired: said of a bullet slightly larger than the bore.n. In mining, a loop made in a rope for convenience in descending a shallow shaft, the miner putting his leg through the loop, by which he is supported while being lowered by the man at the windlass.n. n. A lead of extra thickness used to widen the space between lines of type.n. In mech., a name proposed by Worthington for the mass to which a gravitational unit of force must be applied to produce a foot-pound unit of acceleration; 32.2 (or g) times the mass of a standard pound.