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

Tom Holland‘s Peter Parker made the difficult decision to erase his identity from the world in order to save the multiverse, leaving his girlfriend (Zendaya) and best friend Ned (Jacob Batalon) to forget about him. — Rebecca Rubin, Variety, 2 Aug. 2026

That’s everybody, incuding the love of his life Ned Leeds (Jacob Batalon) and his best friend MJ (Zendaya). — Hannah Abraham, Forbes.com, 2 Aug. 2026

After seeing corrupt cops rewarded with medals and politics debase his best friend, now the courts can’t even be trusted to perform their solemn duty. — Ben Travers, IndieWire, 2 Aug. 2026

Big Pussy was seminal to the show’s lore as Tony’s longtime best friend and trusted mob enforcer; his betrayal in becoming an FBI informant led to his murder and became one of the show’s most memorable scenes early in the show’s run. — Senior Television, Los Angeles Times, 1 Aug. 2026

Word History

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing best friend

• man's best friend

Rhymes for best friend

• amend
• append
• ascend
• attend
• backend
• befriend
• boyfriend
• commend
• compend
• contend
• defend
• depend