n. The long, round, slender rod or pin in spinning wheels by which the thread is twisted, and on which, when twisted, it is wound; also, the pin on which the bobbin is held in a spinning machine, or in the shuttle of a loom.n. A slender rod or pin on which anything turns; an axis.n. The shaft, mandrel, or arbor, in a machine tool, as a lathe or drilling machine, etc., which causes the work to revolve, or carries a tool or center, etc.n. The vertical rod on which the runner of a grinding mill turns.n. A shaft or pipe on which a core of sand is formed.n. The fusee of a watch.n. A long and slender stalk resembling a spindle.n. A yarn measure containing, in cotton yarn, 15,120 yards; in linen yarn, 14,400 yards.n. A solid generated by the revolution of a curved line about its base or double ordinate or chord.n. n. Any marine univalve shell of the genus Rostellaria; -- called also spindle stromb.n. Any marine gastropod of the genus Fusus.verb-intransitive. To shoot or grow into a long, slender stalk or body; to become disproportionately tall and slender.