What does "manhole" mean?

A hole in the ground used to access the sewers or other underground vaults and installations.

What is a synonym for "manhole"?

Common synonyms include: air hole, armhole, blowhole, bullet-hole, bunghole, cringle.

noun, slang

noun, slang ·2 syllables ·Moderate ·College level

Noun

1
A hole in the ground used to access the sewers or other underground vaults and installations.
"The king had scarce ceased to writhe, When hate gave a terrible laugh, Like a manhole opened to Hell."
2
a hole (usually with a flush cover) through which a person can gain access to an underground structure wordnet
3
A hole providing access to the inside of a boiler, tank etc.
4
The anus of man, in a sexual context. informal
"For quotations using this term, see Citations:manhole."
5
The vulva or vagina of a trans man.