The Britannica Dictionary
mobile search
Home
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
×
Britannica Homepage
Ask the Editor
Word of the Day
Quizzes
Core Vocabulary
Browse the Dictionary
The Britannica Dictionary
brother–in–law
1 ENTRIES FOUND:
brother–in–law
(noun)
brother–in–law
/
ˈ
brʌðɚrənˌlɑː/
noun
plural
brothers–in–law
/
ˈ
brʌðɚzənˌlɑː/
brother–in–law
/
ˈ
brʌðɚrənˌlɑː/
noun
plural
brothers–in–law
/
ˈ
brʌðɚzənˌlɑː/
Britannica Dictionary definition of BROTHER–IN–LAW
[
count
]
1
:
the brother of your husband or wife
2
:
the husband of your sister
ASK THE EDITOR
What are the plural forms of
check-in
,
passerby
, and
spoonful
?
See the answer »
QUIZZES
Vocabulary Quiz
Test your word power
Take the Quiz »
Name That Thing
Take our visual quiz
Test Your Knowledge »
WORD OF THE DAY
emulate
:
to try to be like (someone or something you admire)
Learn More »