/ Dictionary / Index B Boyle's law: Meaning and Definition of Find definitions for: Boyle's' law' Pronunciation: [key] — Thermodynam. Thermodynam. the principle that, for relatively low pressures, the pressure of an ideal gas kept at constant temperature varies inversely with the volume of the gas. Also calledCf. Gay-Lussac's law. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Boyle Boyne Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language