- A rapid, persistent chemical change that releases heat and light and is accompanied by flame, especially the exothermic oxidation of a combustible substance. (noun)
- Burning fuel or other material: a cooking fire; a forest fire. (noun)
- Burning intensity of feeling; ardor. See Synonyms at passion. (noun)
- Enthusiasm. (noun)
- Luminosity or brilliance, as of a cut and polished gemstone. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.