main

1 of 2

noun

1
: physical strength : force
used in the phrase with might and main
The next instant we were away down the river, clawing with might and main to keep out of the woods.Mark Twain
2
a
b
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
b

main

2 of 2

adjective

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

Examples of main in a Sentence

Noun My radio runs either off batteries or off the mains. Turn off the water at the mains. Adjective Speed is the main advantage of this approach. The company's main office is located in New York. driving down the main road This dish can be served as a main course or appetizer. And now for the main event of the evening!
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
This April, the discount grocery chain is stocking its shelves with adorable decor, practical porch and patio furniture, and charming Easter tableware—plus snacks, appetizers, mains, and desserts with seasonal flair. Abigail Wilt, Southern Living, 28 Mar. 2025 Dishes include mains such as platters and gyros, sides such as baba ganoush and hummus and desserts such as baklava and chocolate chip cookies. Alexandra Maloney, Charlotte Observer, 21 Mar. 2025
Adjective
Sean Penn co-stars as the film’s main villain, a steely-eyed colonel who looked pretty frigging scary in the footage, while Benicio del Toro is DiCaprio’s gun-toting, gonzo comrade. Brent Lang, Variety, 2 Apr. 2025 The president has touted these tariffs as a way to help the US government rely less on income taxes as a main form of revenue. Elisabeth Buchwald, CNN Money, 2 Apr. 2025 See All Example Sentences for main

Word History

Etymology

Noun

in sense 1, from Middle English, from Old English mǣgen; akin to Old High German magan strength, Old English magan to be able; in other senses, from main entry 2 or by shortening — more at may entry 1

Adjective

Middle English, from Old English mǣgen-, from mǣgen strength

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Adjective

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of main was before the 12th century

Browse Nearby Words

Cite this Entry

“Main.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/main. Accessed 4 Apr. 2025.

Kids Definition

main

1 of 2 noun
1
: physical strength : force
used in the phrase with might and main
2
3
: the chief part : essential point
they are in the main well trained
4
: a principal pipe or circuit of a utility system
gas main
water main

main

2 of 2 adjective
1
: chief entry 1 sense 2, principal
the main idea
2
: pure sense 3, sheer
by main force
3
: being a clause that is capable of standing alone as a simple sentence but is part of a larger sentence that includes a subordinate clause or another main clause
mainly adverb

Geographical Definition

Main

geographical name

ˈmīn How to pronounce Main (audio)
ˈmān
river 325 miles (523 kilometers) long in south central Germany rising in northern Bavaria in the Fichtelgebirge and flowing west into the Rhine River

More from Merriam-Webster on main

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