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Definition of cooler
cooler
/ˈkuː.lɚ/
cool · er
Adverb:coolly
•Plural:coolers
cooler Lexical Profile
CEFR
A2
Grade
3
Tier
1
Usage
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cooler Game Scores & Validity
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WWF
Wordle Guess
• noun
1
An insulated container used for keeping food and beverages cold, typically by storing them with ice.
Example
"We packed the cooler with sandwiches and drinks before heading to the beach."
2
A device or mechanism designed to lower the temperature of a space, liquid, or piece of equipment.
Example
"The office water cooler is a popular spot for employees to chat during breaks."
3
North American A slang term for a jail, prison, or solitary confinement cell.
Example
"The bank robber spent a few nights in the cooler before posting bail."
Synonyms
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Word Origin & Etymology
Formed from the root word 'cool' (from Old English 'cōl') by adding the suffix '-er'. The noun usage referring to a beverage container emerged in the late 19th century.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Cooler. In Wordmom Dictionary. Retrieved Oct 16, 2026, from https://wordmom.com/dictionary/cooler