lengthy

adjective

ˈleŋ(k)-thē 

ˈlen(t)-

lengthier; lengthiest

1

: protracted excessively : overlong

2

: extended, long

lengthily

ˈleŋ(k)-thə-lē 

ˈlen(t)-

adverb

lengthiness

ˈleŋ(k)-thē-nəs 

ˈlen(t)-

noun

Synonyms of lengthy

• long
• elongate

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

The league has yet to announce men’s players, though Landry said the competition is expected to include teenagers as well as veterans who have had lengthy NBA careers. — Jacob Feldman, Sportico.com, 9 July 2026

Computational chemistry often requires specialized expertise, multiple software tools, and lengthy workflows. — Neetika Walter, Interesting Engineering, 9 July 2026

Peter Weber has issued a lengthy critique of The Love Producer, a new memoir by former Bachelor producer Julie LaPlaca. — Ryan Coleman, Entertainment Weekly, 8 July 2026

There is no reservation-heavy itinerary or lengthy transfer, only an open view, a comfortable seat and one of Manila’s most recognizable daily spectacles. — Ching Dee, Forbes.com, 8 July 2026

Word History

First Known Use

1689, in the meaning defined at sense 1

Kids Definition

lengthy

adjective

ˈleŋ(k)-thē 

ˈlen(t)-

lengthier; lengthiest

: very long

lengthily

-thə-lē 

adverb

lengthiness

-thē-nəs 

noun