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best friend

noun

plural best friends
1
: a person's closest and dearest friend
She's my best friend.
We have been best friends since high school.
2
: a person's most desirable or valuable possession or resource
Diamonds may be a girl's best friend, but gold is more affordable.William Giese
Lycra-cotton leggings and tunic tops are the pregnant woman's best friend, sartorially speaking.Anne Reeks
When cops bang on the door, the toilet is a drug dealer's best friend.Frederick Kaufman

Examples of best friend in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Her lifelong best friend Mac (Kristoffer Polaha) also finds himself at the Opry and manages to also take the leap back in time on that very same pew. Rebecca Angel Baer, Southern Living, 27 Nov. 2025 The film follows two best friends from South Central, down on their luck and desperate for more, who take a chance encounter as an invitation to trade their dead-end lives in Los Angeles for something new. Leo Barraclough, Variety, 27 Nov. 2025 Levy started learning to play tenor sax during his sixth grade year at La Jolla Elementary School, in large part because one of his best friends had taken up the instrument. George Varga, San Diego Union-Tribune, 26 Nov. 2025 And by far Rome's best friend in the whole wide world. Allison Degrushe, Entertainment Weekly, 26 Nov. 2025 See All Example Sentences for best friend

Word History

First Known Use

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of best friend was in the 13th century

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Cite this Entry

“Best friend.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/best%20friend. Accessed 28 Nov. 2025.

Last Updated: - Updated example sentences
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