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

Get ready for Rebel Wilson to save the day while trying to survive her best friend's wedding. —Benjamin Vanhoose, People.com, 23 Apr. 2025

In the fifth episode of the final season, the Gilead survivors and best friends agree to not compare their suffering. —Jackie Strause, HollywoodReporter, 23 Apr. 2025

The first step, planning a proper work/vacation with your best friend. —Kimberly Wilson, Essence, 23 Apr. 2025

The siblings are now inseparable and it's been great to see how having his best friend around has helped Grey. —Ross Rosenfeld, MSNBC Newsweek, 23 Apr. 2025

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