/ Dictionary / Index B butane: Meaning and Definition of Find definitions for: bu•tane Pronunciation: (by'tān, by-tān'), [key] — n. Chem. a colorless, flammable gas, CH, a saturated aliphatic existing in two isometric forms: used chiefly in the manufacture of rubber and as fuel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: butane (Thesaurus) butadiene butanoic acid Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language