mainly
Americanadverb
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chiefly; principally; for the most part; in the main; to the greatest extent.
Our success was due mainly to your efforts. The audience consisted mainly of students.
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Obsolete. greatly; mightily; abundantly.
adverb
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for the most part; to the greatest extent; principally
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obsolete strongly; very much
Etymology
Origin of mainly
First recorded in 1225–75, mainly is from the Middle English word maynliche, maynly. See main 1, -ly
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Mainly, while all of the top candidates have impressive resumes, there’s a lack of star power that could help propel someone to the forefront.
From Los Angeles Times • May 31, 2026
Mainly, the loans can be difficult to value and are risky in periods of economic trouble.
From Barron's • Apr. 4, 2026
Mainly, this matters in the realm of cinematic and box office achievement, for which “Sinners” won a 2026 Golden Globe.
From Salon • Mar. 13, 2026
Emergency medicine specialist Kimberly Humphrey, currently helping patients at the COP medical centre, told the BBC that the injuries are "Mainly people with smoke inhalation, someone with a lung injury from smoke."
From BBC • Nov. 20, 2025
"Mainly commercials, but not for any banks or car dealerships, because those are usually choral arrangements."
From "Me Talk Pretty One Day" by David Sedaris
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.