Simple Definition of inflammable
: capable of being set on fire and of burning quickly
: easily excited or angered
Examples of inflammable in a sentence
<some pajamas are made of inflammable material, so be careful>
Did You Know?
Combustible and "incombustible" are opposites but "flammable" and "inflammable" are synonyms. Why? The "in-" of "incombustible" is a common prefix meaning "not," but the "in-" of "inflammable" is a different prefix. "Inflammable," which dates back to 1605, descends from Latin inflammare ("to inflame"), itself from "in-" (here meaning "in" or "into") plus "flammare" ("to flame"). "Flammable" also comes from "flammare," but didn't enter English until 1813. In the early 20th century, firefighters worried that people might think inflammable meant "not able to catch fire," so they adopted "flammable" and "nonflammable" as official safety labels and encouraged their use to prevent confusion. In general use, "flammable" is now the preferred term for describing things that can catch fire, but "inflammable" is still occasionally used with that meaning as well.
Origin of inflammable
French, from Medieval Latin inflammabilis, from Latin inflammare
First Known Use: 1605
INFLAMMABLE Defined for Kids
Seen and Heard
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