the mains
Definition of the mains
British
: the system of pipes or wires for electricity, gas, or water My radio runs either off batteries or off the mains. —often used as mains before another noun We haven't had any mains water/electricity since the storm.
From the M-W Editors
Word by Word Definitions
Seen and Heard
What made you want to look up the mains? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!