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Synonyms

lengthen

American  
[lengk-thuhn, leng-, len-] / ˈlɛŋk θən, ˈlɛŋ-, ˈlɛn- /

verb (used with object)

  1. to make longer; make greater in length.

    Synonyms:
    elongate
    Antonyms:
    shorten

verb (used without object)

  1. to become greater in length; grow long or longer.

lengthen British  
/ ˈlɛŋθən, ˈlɛŋkθən /

verb

  1. to make or become longer

"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

Related Words

Lengthen, extend, stretch, prolong, protract agree in the idea of making longer. To lengthen is to make longer, either in a material or an immaterial sense: to lengthen a dress. To extend is to lengthen beyond some original point or so as to reach a certain point: to extend a railway line by a hundred miles. To stretch is primarily to lengthen by drawing or tension: to stretch a rubber band. Both prolong and protract mean especially to lengthen in time, and therefore apply to intangibles. To prolong is to continue beyond the desired, estimated, or allotted time: to prolong an interview. To protract is to draw out to undue length or to be slow in coming to a conclusion: to protract a discussion.

Other Word Forms

  • lengthener noun
  • outlengthen verb (used with object)
  • unlengthened adjective

Etymology

Origin of lengthen

First recorded in 1490–1500; length + -en 1

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.

A green-arrow lengthens the overall cycle of traffic signals so travelers wait more seconds to go, in exchange for more safety.

From Seattle Times

Climate Central found the growing season had lengthened since 1970 for 80% of the than 200 cities across the U.S. it analyzed.

From Seattle Times

The Legislature’s public safety committees have a record of sidelining bills that would lengthen prison sentences or create new crimes, because the Democrats who control them do not want California to incarcerate more people.

From Los Angeles Times

The new bill would lengthen jail terms and force people to undergo "conversion therapy", practices intended to change their sexual orientation.

From Reuters

That’s attributable, in part, to a slew of get-tough laws passed on the federal and state level, which lengthened mandatory sentences for many crimes.

From Seattle Times