flam·​ma·​ble ˈfla-mə-bəl How to pronounce flammable (audio)
: capable of being easily ignited and of burning quickly
flammable noun

Examples of flammable in a Sentence

avoid wearing loose flammable clothing when using the blowtorch
Recent Examples on the Web As well as flammable invasive plants sparking and spreading wildfires, climate change is enabling invasive species to move north – even to remote areas such as high mountains, deserts and frozen tundra. Helen Regan, CNN, 5 Sep. 2023 Officials with Hillsboro Fire and Rescue said the fire was caused by flammable materials stored close to a baseboard heater. oregonlive, 4 Sep. 2023 Dead, dry leaves, grasses and branches are more flammable than living plants. Nan Sterman, San Diego Union-Tribune, 2 Sep. 2023 The heat causes the cell to vent flammable gas, which can ignite and catch fire. Elizabeth Weise, USA TODAY, 1 Sep. 2023 The risk of wildfires has increased in Hawaii, too, as global temperatures rise and highly flammable, non-native grasses spread on former sugar and pineapple plantations. Jenny Jarvie, Anchorage Daily News, 1 Sep. 2023 Irshad said rioters first looted property from the buildings and then used flammable liquids to set them on fire. Chris Pandolfo, Fox News, 23 Aug. 2023 When a train derailed on Feb. 3 in East Palestine, Ohio, containing the highly flammable and toxic chemical vinyl chloride, conspiracies took over social media about acid rain spreading to the East Coast. Kalhan Rosenblatt, NBC News, 15 Aug. 2023 Leaders are especially concerned about older and low-income residents who can’t afford work to greatly reduce flammable vegetation on their properties. Alex Brown, oregonlive, 27 Aug. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'flammable.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Latin flammare to flame, set on fire, from flamma

First Known Use

1813, in the meaning defined above

Time Traveler
The first known use of flammable was in 1813

Dictionary Entries Near flammable

Cite this Entry

“Flammable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flammable. Accessed 29 Sep. 2023.

Kids Definition


flam·​ma·​ble ˈflam-ə-bəl How to pronounce flammable (audio)
: capable of being easily set on fire and of burning rapidly
a flammable liquid
flammable noun

More from Merriam-Webster on flammable

Last Updated: - Updated example sentences
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