He's my brother-in-law.

Meaning

He is the brother of my spouse.

Examples

• John: 'This is my wife’s brother.'<br>
• Alice: 'Oh, so he's <b>your brother-in-law</b>?'
• John: 'That's Tom, <b>he's my brother-in-law</b>.'
• Alice: 'Who is that man?'<br>