: a container often somewhat narrowed toward the outlet and often fitted with a closure: such as
a
: a broad flattened necked vessel used especially to carry an alcoholic beverage on the person
b
British
: thermos
Examples of flask in a Sentence
Recent Examples on the Web
There are also passages that feel more clinical: simulations of the laboratory, with analytical diagrams that graph the precise dye content of yellow dresses, and crystals to sniff from round-bottom flasks.
—
Jason Farago, New York Times, 9 May 2024
Another lab there is somewhat less eye-catching – full of scientific flasks with clouds of brown algae in them.
—Ryan Kellman, NPR, 17 Apr. 2024
See all Example Sentences for flask 
Jason Farago, New York Times, 9 May 2024
Another lab there is somewhat less eye-catching – full of scientific flasks with clouds of brown algae in them.
—Ryan Kellman, NPR, 17 Apr. 2024
See all Example Sentences for flask
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'flask.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near flask
Cite this Entry
“Flask.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flask. Accessed 28 May. 2024.
Copy CitationKids Definition
flask
noun
: a container shaped like a flattened bottle
Medical Definition
flask
1 of 2 noun
: a container often somewhat narrowed toward the outlet and often fitted with a closure: as
a
: any of various usually blown-glass vessels used for technical purposes in a laboratory
b
: a metal container in which the materials used to form a dental restoration (as a denture) are processed
flask
2 of 2 transitive verb
: to place (a denture) in a flask for processing
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