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
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Despite her reluctance, Ava decides to show up for her best friend, and the two embark on an extravagant European trip that involves driving stick shift in the streets of Paris, high-end dining, shopping and clubbing until dawn. Anthony Robledo, USA Today, 29 May 2026 If not for Breen’s strong dad and one of his best friends – who made a pretty good name for himself in the sportscasting world – Breen probably isn’t on the call for Game 1 in Oklahoma City or San Antonio. Andrew Marchand, New York Times, 29 May 2026 Dal Bello made sure to pay tribute to one of his brother Kai’s best friends, Braun Levi, who was killed by an alleged driver under the influence on May 4, 2025, weeks before his high school graduation and months after his family lost their home in the Palisades fire. Sam Mulick, Daily News, 29 May 2026 Her ability to ask the right questions and find answers puts her on equal ground with Reilly and his best friend Robbie Robertson, the investigative journalist played by Morris, leading her to a rightful promotion at the end of series. Maira Garcia, Los Angeles Times, 29 May 2026 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 4 Jun. 2026.

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