ˈflask How to pronounce flask (audio)
: a container often somewhat narrowed toward the outlet and often fitted with a closure: such as
: a broad flattened necked vessel used especially to carry an alcoholic beverage on the person
British : thermos

Example Sentences

Recent Examples on the Web There will be a bourbon bar on the concourse, a Louisville Mashers flask giveaway and a post-game firework show. The Courier-Journal, 1 Sep. 2022 Does the occasional beer bottle or flask show that people were finding ways around Prohibition? Palak Jayswal, The Salt Lake Tribune, 22 Aug. 2022 This pack is designed to stay close to your body with little to no bounce, and the flask can be pulled out with one hand while on the move. Maggie Slepian, Popular Mechanics, 4 Nov. 2022 After 2,500 years, the flask washes ashore in Turkey. Bonnie Johnson, Los Angeles Times, 26 Aug. 2022 This charming pocket flask is a fun gift to put in someone's stocking. Jamie Kravitz, Woman's Day, 10 Aug. 2022 There are a number of ways to salute the fun of catching big fish on hoppers, but our favorite is a swig from a stainless-steel flask ($30). Nick Kelley, Outside Online, 14 May 2015 Mandi Wilson, a university administrator from Essex, had a bingo card on her phone, made by her daughter, of sights to photograph while in the queue: an overflowing bin, a Union Jack, a crying child, a flask of tea. Sam Knight, The New Yorker, 17 Sep. 2022 As impressive as the taste is the sustainable packaging: the world’s first reusable gin flask, keeping drinks hot or cold for hours. Joanne Shurvell, Forbes, 8 Aug. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flask.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Middle French flasque powder flask, ultimately from Late Latin flascon-, flasco bottle, probably of Germanic origin; akin to Old High German flaska bottle

First Known Use

1549, in the meaning defined above

Time Traveler
The first known use of flask was in 1549

Dictionary Entries Near flask

Cite this Entry

“Flask.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flask. Accessed 1 Dec. 2022.

Kids Definition



: a container shaped like a flattened bottle

Medical Definition

flask 1 of 2


: a container often somewhat narrowed toward the outlet and often fitted with a closure: as
: any of various usually blown-glass vessels used for technical purposes in a laboratory
: a metal container in which the materials used to form a dental restoration (as a denture) are processed


2 of 2

transitive verb

: to place (a denture) in a flask for processing

More from Merriam-Webster on flask

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