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1. Easily ignited and capable of burning rapidly; flammable. See Usage Note at flammable.
2. Quickly or easily aroused to strong emotion; excitable.
[Middle English, liable to inflammation, from Medieval Latin īnflammābilis, from Latin īnflammāre, to inflame; see inflame.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.