plural flasks
1
: a container that is shaped like a flattened bottle and that is used to carry alcohol
a flask of whiskey
called also hip flask
2
: a glass bottle used in scientific laboratories
3
British
: thermos
Cite this Entry
“Flask.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/flask. Accessed 17 Apr. 2026.
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