2 noun
1 [countable]TBC a large pipe or wire carrying the public supply of water, electricity, or gas:
The report found that many of Yorkshire's water mains needed replacing.
a burst gas main
2 British English

the mains

TEEDHH the place on a wall where you can connect something to a supply of electricity:
You can run the torch off batteries or plug it into the mains.
at the mains
Make sure that the television is turned off at the mains.

mains gas/water/electricity

TP gas, water, or electricity supplied to a building through a pipe or wire:
The heater will run off mains gas or bottled gas.

in the main

Their job in the main consisted of cleaning and maintaining the building.

Dictionary results for "main"
Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.