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
underworld
1 ENTRIES FOUND:
underworld
(noun)
underworld
/
ˈ
ʌndɚˌwɚld/
noun
underworld
/
ˈ
ʌndɚˌwɚld/
noun
Britannica Dictionary definition of UNDERWORLD
[
singular
]
1
:
the world of crime and criminals
the criminal
underworld
an
underworld
spy
[+] more examples
[-] hide examples
[+] Example sentences
[-] Hide examples
2
the underworld
:
the place where dead people go in Greek myths
ASK THE EDITOR
Why do we say "did you know" rather than "do you know"?
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
protocol
:
a system of rules that explain the correct conduct and procedures to follow in formal situations
Learn More »