Definition of flammable adjective from the Oxford Advanced American Dictionary

 

flammable

 adjective
adjective
NAmE//ˈflæməbl//
 
(also inflammable)
 
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that can burn easily highly flammable liquids Flammable and inflammable have the same meaning, but it is usually better to use flammable to avoid confusion. The opposite of both words is nonflammable. opposite nonflammable
See the Oxford Advanced Learner's Dictionary entry: flammable