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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Salefski said during her testimony that Rita’s daughter is one of her best friends, and Rita was supporting her candidacy. Olivia Stevens, Chicago Tribune, 27 Mar. 2026 Moustache joined my plump tortoiseshell Toffee, the progeny of frisky barn cats, an elderly rabbit rescued from neglect, and my best friend Bacon, a good dog adopted from Lifeline Puppy Rescue years before. Krista Kafer, Denver Post, 27 Mar. 2026 Even so, my ideal pantry starter kit will look different from yours, or your neighbor’s, or your best friend’s, its contents dependent on your flavor and cuisine preferences and lifestyle choices. Alaina Chou, Bon Appetit Magazine, 27 Mar. 2026 Emily Osment and Mitchell Musso played Miley’s best friends, Lilly and Oliver, while Jason Earles played her brother, Jackson. Tony Maglio, HollywoodReporter, 27 Mar. 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 Apr. 2026.

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