/ Dictionary / Index S sievert: Meaning and Definition of Find definitions for: sie•vert Pronunciation: (sē'vurt), [key] — Physics. Physics.n. the SI unit of dose equivalent when the absorbed dose is measured in gray. Abbr.: Sv Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sievers sieve tube Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language