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Synonyms

lengthy

American  
[lengk-thee, leng-, len-] / ˈlɛŋk θi, ˈlɛŋ-, ˈlɛn- /

adjective

  • lengthier,
    comparative
  • lengthiest
    superlative
  1. having or being of great length; very long.

    a lengthy journey.

  2. tediously verbose; very long; too long.

    a lengthy speech.


lengthy British  
/ ˈlɛŋθɪ, ˈlɛŋkθɪ /

adjective

  1. of relatively great or tiresome extent or duration

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Adjectives

Etymology

Origin of lengthy

An Americanism dating back to 1680–90; length + -y 1

Explanation

Lengthy things are long and drawn out. Your teacher's lengthy lecture might extend far beyond the end of class and leave many people dozing at their desks. The adjective lengthy is almost always used to describe a duration of time (or sometimes a long piece of writing), rather than the physical length of something. So long-lasting speeches and endless waits at the bus stop could both be called lengthy, but you wouldn't describe your friend's long hair that way. Lengthy is an 18th century American invention, also adopted by the British in the nineteenth century.

Keep Reading on Vocabulary.com

Vocabulary lists containing lengthy

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.

See Examples For:

Job searches can be lengthy and grueling for people who are out of work and looking.

From MarketWatch Aug. 28, 2026

And, yes, lengthy, instructive captions and special hashtags still help boost posts.

From Slate Aug. 28, 2026

Wanting to avoid a lengthy court battle, Parton settled for about $1m.

From BBC Aug. 26, 2026

Breast cancer is not included in France's official list of occupational diseases, meaning that obtaining recognition can be a lengthy and difficult ordeal for patients.

From Barron's Aug. 26, 2026

But amazingly, after a lengthy investigation was held, the players were acquitted.

From "1919 The Year That Changed America" by Martin W. Sandler

Loadings at a Mediterranean port have picked up as Saudi Arabia races to offer its oil to buyers through a lengthier — and more expensive — backdoor.

From The Wall Street Journal Jul. 28, 2026

Meta's spokesperson told the BBC the majority of its glasses users would not be impacted by its move to limit lengthier Conversation Focus use to subscribers.

From BBC Jul. 2, 2026

When it comes to longer-term bonds, the analysts’ formula requires an even lengthier holding period.

From MarketWatch May 22, 2026

Demand also was strong for lengthier maturities, with a new 30-year bond seeing strong demand External link at Thursday’s auction.

From Barron's Feb. 13, 2026

Many judges, prosecutors, and defense lawyers do a poor job of recognizing the special needs of the mentally disabled, which leads to wrongful convictions, lengthier prison terms, and high rates of recidivism.

From "Just Mercy" by Bryan Stevenson

After the onset of the pandemic, Corning endured six consecutive quarters of shrinking revenue, its lengthiest drop since the 2001 telecom crash.

From The Wall Street Journal Feb. 7, 2026

Six years would also be longer than the two lengthiest contracts Pete Carroll received with Seattle.

From Seattle Times Feb. 5, 2024

Liu’s case appears to be one of the lengthiest deputy shooting investigations in recent sheriff’s department history, according to county records.

From Los Angeles Times Nov. 17, 2023

They were his strongest comments to date, one of the lengthiest and most passionate answers from Woods, who for so many years preferred that his clubs delivered the message.

From Washington Times Jul. 12, 2022

But the lengthiest story in the book, “The Farmer and the Hunt,” was unfamiliar to her, and she stared often and long at the illustration that accompanied it.

From "Ash" by Malinda Lo

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