lengthy

adjective

ˈleŋ(k)-thē How to pronounce lengthy (audio)
ˈlen(t)-
lengthier; lengthiest
Synonyms of lengthynext
1
: protracted excessively : overlong
2
lengthily adverb
lengthiness noun

Examples of lengthy in a Sentence

The process is both lengthy and costly. a series of lengthy delays Lengthier trips require more planning.
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.
So too do the lengthy detentions some people experience in massive detention centers. Zoe Sottile, CNN Money, 16 Feb. 2026 Chastain ended the lengthy note with a hint of skepticism about whether the series would ever air at all. Cheyenne Roundtree, Rolling Stone, 15 Feb. 2026 The lengthy journey adds another layer of cost to California’s already expensive gasoline market. Will Kubzansky, Fortune, 15 Feb. 2026 The ski carries a relatively large 70-L (15-gal) tank, providing enough longevity for lengthy sessions on the water. New Atlas, 14 Feb. 2026 See All Example Sentences for lengthy

Word History

First Known Use

1689, in the meaning defined at sense 1

Time Traveler
The first known use of lengthy was in 1689

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Cite this Entry

“Lengthy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lengthy. Accessed 17 Feb. 2026.

Kids Definition

lengthy

adjective
ˈleŋ(k)-thē How to pronounce lengthy (audio)
ˈlen(t)-
lengthier; lengthiest
: very long
lengthily adverb
lengthiness noun

More from Merriam-Webster on lengthy

Last Updated: - Updated example sentences
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