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

Definition of lengthen

transitive verb

: to make longer

intransitive verb

: to grow longer

Other Words from lengthen

lengthener \ ˈleŋ(k)th-​nər How to pronounce lengthen (audio) , ˈlen(t)th-​ ; ˈleŋ(k)-​thə-​ , 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 To reach such an age is impressive for anyone—but especially for the royal, who continues to lengthen her record as the longest-serving monarch of the United Kingdom. Elise Taylor, Vogue, 21 Apr. 2022 Fahrenheit, the season would be expected to lengthen by about 10 days. NBC News, 15 Mar. 2022 Climatologists said rare April snow along with rain sweeping across the Pacific Northwest this week could increase water supplies, slow snow melt and lengthen the irrigation season. From Usa Today Network And Wire Reports, USA TODAY, 15 Apr. 2022 This is just his third Masters and his first playing in the same field with Tiger and with fans, with roars echoing through the Georgia pines as the shadows lengthen on Saturday and Sunday afternoon. Mark Zeigler, San Diego Union-Tribune, 8 Apr. 2022 Lightweight fibers coat each strand to lengthen for a dramatic feathery flutter that rivals falsies. Danielle Directo-meston, The Hollywood Reporter, 19 Feb. 2022 This is a great exercise for desk jockeys to do throughout the day to help lengthen the muscles, Ms. Crosby says. Jen Murphy, WSJ, 29 Jan. 2022 Enthusiastic paddlers can lengthen this trip on either end for more fun. Outside Online, 20 June 2021 Circular business models design out waste, lengthen product usage timeframes and return materials to the product lifecycle. Euan Davis, Forbes, 21 Apr. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lengthen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of lengthen

14th century, in the meaning defined at transitive sense

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

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Dictionary Entries Near lengthen

length-breadth index



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Last Updated

6 Jun 2022

Cite this Entry

“Lengthen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lengthen. Accessed 26 Jun. 2022.

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More Definitions for lengthen


length·​en | \ ˈleŋ-thən How to pronounce lengthen (audio) \
lengthened; lengthening

Kids Definition of lengthen

: to make or become longer lengthen a dress

More from Merriam-Webster on lengthen

Nglish: Translation of lengthen for Spanish Speakers

Britannica English: Translation of lengthen for Arabic Speakers


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