brother-in-law

noun

broth·​er-in-law ˈbrə-t͟hər-ən-ˌlȯ 

ˈbrət͟h-rən-,

ˈbrə-t͟hərn-

plural brothers-in-law ˈbrə-t͟hərz-ən- 

1

: the brother of one's spouse

2

a

: the husband of one's sibling

b

: the husband of one's spouse's sibling

Examples of brother-in-law in a Sentence

Recent Examples on the Web

Kavita Lele lost her husband Sanjay, 50, and two cousins – Hemant Joshi, 45, and Atul Mone, 43 – in the attack, her brother-in-law Rajesh Kadam told CNN. —Aishwarya S Iyer, CNN Money, 26 Apr. 2025

According to Breen’s brother-in-law, Corey Feist, many people worried that any move to take care of their mental health could affect their jobs. —Christina Ray Stanton, New York Daily News, 26 Apr. 2025

According to Gilbert’s brother-in-law, Charles Brown, the pair fishing late at night was not out of the ordinary. —Angel Saunders, People.com, 25 Apr. 2025

Her son was known in the small Massachusetts community for stepping up to raise his niece and nephew after his sister and brother-in-law died. —Michael Loria, USA Today, 25 Apr. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for brother-in-law

• avoirdupois
• aa
• aha
• bashaw
• bradshaw
• byelaw
• bylaw
• chainsaw
• cheraw
• coleslaw
• crenshaw
• dada

Kids Definition

brother-in-law

noun

broth·​er-in-law

ˈbrət͟h-(ə-)rən-ˌlȯ,

ˈbrət͟h-ərn-ˌlȯ

plural brothers-in-law

ˈbrət͟h-ər-zən-

1

: the brother of one's spouse

2

: the husband of one's sibling or of one's spouse's sibling