Definition of flammable in English:



  • Easily set on fire.

    ‘the use of highly flammable materials’
    • ‘It is thought to have been started with flammable material which caused an explosion damaging three windows.’
    • ‘Kerosene is volatile, flammable and leaks very easily from containers.’
    • ‘A process might be hazardous if it involves flammable or combustible materials.’
    • ‘This is because polystyrene is a flammable material that gives off a toxic black smoke in the event of a fire.’
    • ‘Small fires had been feeding upon flammable materials, but they were not large enough to turn on the sprinkler system.’
    • ‘Any warehouse or factory holding stocks of flammable material needs to be relocated to an industrial estate.’
    • ‘The incidents happened just hours after the fire brigade helped residents clear up the estate in the hope of removing flammable materials.’
    • ‘Against common sense and regulations, the interiors of the cars were built with flammable materials.’
    • ‘Assemble all the really flammable material you can find, and build the smallest fire you can.’
    • ‘It is a highly flammable and unstable compound, with a life of between thirty and eighty years.’
    • ‘Fire chiefs are now warning homeowners not to leave lighted candles unattended and close to flammable materials.’
    • ‘He said such incidents are common because of the flammable materials involved in the construction of thatched cottages.’
    • ‘Whatever we did, we always did it with a bottle of something flammable, fires made a good end to the day.’
    • ‘It's believed one of the fires was started using paraffin and other flammable materials stored in the shed.’
    • ‘It is also a time to turf out unwanted, though preferably easily flammable, things from around the house and to chuck them onto the bonfire.’
    • ‘The bonfire will last only as long as supply of cards, flowers and other flammable material is available, so get there early!’
    • ‘In some places, a smoking ban is justified for safety reasons such as in confined spaces or where flammable material is present.’
    • ‘Standing or fallen dry weeds can be highly flammable fire hazards in late fall, winter and early spring.’
    • ‘On one occasion, an emergency route was blocked with flammable materials and on another, an exit was blocked by cars.’
    • ‘As you well know, there are some kinds of this material that are highly flammable.’
    inflammable, burnable, combustible, incendiary, unstable
    View synonyms


The words flammable and inflammable actually mean the same thing: see inflammable


Early 19th century: from Latin flammare, from flamma ‘a flame’.