/ Dictionary / Index H headstock: Meaning and Definition of Find definitions for: head•stock Pronunciation: (hed'stok"), [key] — n. the part of a machine containing or directly supporting the moving or working parts, as the assembly supporting and driving the live spindle in a lathe. See illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: headstock (Thesaurus) headstay headstone Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language