/ Dictionary / Index C cross-staff: Meaning and Definition of Find definitions for: cross-staff Pronunciation: (krôs'staf", -stäf", kros'-), [key] — pl. -staffs, -staves. an instrument for measuring the angle of elevation of heavenly bodies, consisting of a calibrated staff with another shorter staff perpendicular to and sliding on it. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cross section cross-sterile Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language