lengthen

verb

length·​en ˈleŋ(k)-thən How to pronounce lengthen (audio)
ˈlen(t)-
lengthened; lengthening
ˈleŋ(k)th-niŋ,
ˈlen(t)th-;
ˈleŋ(k)-thə- How to pronounce lengthen (audio)
ˈlen(t)-

transitive verb

: to make longer

intransitive verb

: to grow longer
lengthener
ˈleŋ(k)th-nər
ˈlen(t)th-;
ˈleŋ(k)-thə- How to pronounce lengthen (audio)
ˈlen(t)-
noun
Choose the Right Synonym for lengthen

extend, lengthen, prolong, protract mean to draw out or add to so as to increase in length.

extend and lengthen imply a drawing out in space or time but extend may also imply increase in width, scope, area, or range.

extend a vacation
extend welfare services
lengthen a skirt
lengthen the workweek

prolong suggests chiefly increase in duration especially beyond usual limits.

prolonged illness

protract adds to prolong implications of needlessness, vexation, or indefiniteness.

protracted litigation

Examples of lengthen in a Sentence

The days lengthened with the approach of spring. Proper care will lengthen the life of the engine. lengthen a pair of trousers
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.
Be sure your chin is parallel with the floor and your neck is lengthening up the entire time. Deborah Vankin, Los Angeles Times, 4 Feb. 2025 Such enhancements can significantly lengthen potential prison terms. Jakob Rodgers, The Mercury News, 28 Jan. 2025 In the poll, 68% say that the period that buildings should perform work and inspections should be shortened and the length of time between inspections lengthened. Bradley Tusk, New York Daily News, 26 Jan. 2025 Haiti’s government spent more than $3.8 million to prepare for Petro’s visit, which included lengthening the small airport’s runway to accommodate Petro’s military aircraft, cleaning the streets and turning the electricity back on for the first time in three years. Jacqueline Charles, Miami Herald, 24 Jan. 2025 See all Example Sentences for lengthen 

Word History

First Known Use

14th century, in the meaning defined at transitive sense

Time Traveler
The first known use of lengthen was in the 14th century

Dictionary Entries Near lengthen

Cite this Entry

“Lengthen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lengthen. Accessed 11 Feb. 2025.

Kids Definition

lengthen

verb
length·​en ˈleŋ(k)-thən How to pronounce lengthen (audio)
ˈlen(t)-
lengthened; lengthening ˈleŋ(k)th-(ə-)niŋ How to pronounce lengthen (audio)
ˈlen(t)th-
: to make or become longer
lengthener noun

More from Merriam-Webster on lengthen

Last Updated: - Updated example sentences
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