Definition of flammable in English:



  • Easily set on fire.

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