plural lengths ˈleŋ(k)ths How to pronounce length (audio)
ˈlen(t)ths,
ˈleŋ(k)s
1
a
: the longer or longest dimension of an object
b
: a measured distance or dimension
10 feet in length
see Metric System Table, Weights and Measures Table
c
: the quality or state of being long
the length of the journey
2
a
: duration or extent in time
b
: relative duration or stress of a sound (such as a vowel or syllable in prose or a note in music)
3
a
: distance or extent in space
a street with its length of colonial houses
b
: the length of something taken as a unit of measure
his horse led by a length
4
: the degree to which something (such as a course of action or a line of thought) is carried
often used in plural
went to great lengths to learn the truth
5
a
: a long expanse or stretch
her lengths of lustrous hair
b
: a piece constituting or usable as part of a whole or of a connected series : section
a length of pipe
6
: the longer or vertical dimension of a piece of clothing
often used in combination
elbow-length sleeves
Phrases
at length
1
: fully, comprehensively
The issue was debated at length.
2
: at last : finally
We at length reached the top of the mountain.

Examples of length in a Sentence

The length of the table is six feet, and its width is three feet. These pins are available in one- and two-inch lengths. The adult animals reach a maximum length of two meters. Your essay should be no more than 250 words in length. the length of a movie They were two car lengths behind us.
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.
On October 25, the 28-year-old actor unveiled a completely fresh look on the Christy premiere red carpet, starting with a chin-length chop by celebrity hairstylist Glen Coco Oropeza. Emily Tannenbaum, Glamour, 26 Oct. 2025 This is a very capable cargo van that can be ordered in 3 roof heights, 3 GVW’s (gross vehicle weight), 1500, 2500 and 3500, and 4 body lengths, so there is a RAM ProMaster van for everyone’s needs. Tony Leopardo, Mercury News, 26 Oct. 2025 The Li Auto Mega serves as the company’s large electric minivan, measuring 5,350 mm in length, 1,965 mm in width, and 1,850 mm in height, with a 3,300 mm wheelbase. Bojan Stojkovski, Interesting Engineering, 26 Oct. 2025 This interview has been edited for length and clarity. Jennifer Liu, CNBC, 26 Oct. 2025 See All Example Sentences for length

Word History

Etymology

Middle English lengthe, from Old English lengthu, from lang long

First Known Use

before the 12th century, in the meaning defined at sense 1a

Time Traveler
The first known use of length was before the 12th century

Cite this Entry

“Length.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/length. Accessed 29 Oct. 2025.

Kids Definition

1
a
: the measured distance from one end to the other of the longer or longest side of an object
also : any measured distance
b
: the quality or state of being long
2
a
: the amount of time something takes
the length of a visit
b
: the sound of a vowel or syllable as it is affected by the time needed to pronounce it
3
: a piece of something long
a length of pipe
4
: the distance from top to bottom of an article of clothing

More from Merriam-Webster on length

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