Dictionary

1main

noun \ˈmān\

: the largest pipe in a system of connected pipes

the mains : the system of pipes or wires for electricity, gas, or water

: the place where electricity, gas, or water enters a building or room

Full Definition of MAIN

1
:  physical strength :  force —used in the phrase with might and main
2
a :  mainland
b :  high sea
3
:  the chief part :  essential point <they are in the main well-trained>
4
:  a pipe, duct, or circuit which carries the combined flow of tributary branches of a utility system
5
a :  mainmast
b :  mainsail
ADVERTISEMENT

Origin of MAIN

in sense 1, from Middle English, from Old English ̄gen; akin to Old High German magan strength, Old English magan to be able; in other senses, from 2main or by shortening — more at may
First Known Use: before 12th century

2main

adjective

: most important

Full Definition of MAIN

1
:  chief, principal <the main idea>
2
:  fully exerted :  sheer <main force> <by main strength>
3
obsolete :  of or relating to a broad expanse (as of sea)
4
:  connected with or located near the mainmast or mainsail
5
:  expressing the chief predication in a complex sentence <the main clause>

Origin of MAIN

Middle English, from Old English ̄gen-, from ̄gen strength
First Known Use: 15th century

Main

geographical name \ˈmīn, ˈmān\

Definition of MAIN

river 325 miles (523 kilometers) S cen Germany rising in N Bavaria in the Fichtelgebirge & flowing W into the Rhine
MAIN Defined for Kids

1main

adjective \ˈmān\

Definition of MAIN for Kids

:  first in size, rank, or importance :  chief <Go in the main entrance.> <What's the main reason?>
main·ly adverb

2main

noun

Definition of MAIN for Kids

1
:  the chief part :  essential point <The new workers are in the main well trained.>
2
:  a principal line, tube, or pipe of a utility system <water main> <gas main>
3
:  high seas
4
:  physical strength :  force <So they stood … both shoving with might and main … — Mark Twain, Tom Sawyer>
ADVERTISEMENT
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears