longest

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UK/ˈlɒŋɡəst/UK/ˈlɒŋɡɪst/US/ˈlɔŋɡəst/cot caught merger/ˈlɑŋ.ɡəst/

noun

Something that is longer than all others in its class.

OriginEnglish long ← Middle English long ← Old English lang →
CommonScrabble 8
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Meanings

longest1

adjective
  1. superlativesuperlative form of long: most long

    It's not the longest or tallest viaduct in Britain, but the landscape upon which it sits makes for a stunning backdrop.

    2025 October 1, Chris Howe, “Top 10: Britain's most significant rail bridges: Ribblehead Viaduct”, in RAIL, number 1045, page 57
adverb
  1. superlativesuperlative form of long: most long
nounlongest (plural longests)

plural longests

  1. Something that is longer than all others in its class.

    The game's legacy transcended all the longests and firsts for UCLA. It inspired Salcedo to want to play for the Bruins, especially after the team awarded him a championship ring at its postseason banquet.

    2018, Ben Bolch, 100 Things UCLA Fans Should Know & Do Before They Die (page 297)
verb
  1. archaicindicativepresentsecond personsingularsecond-person singular simple present indicative of long

Longest2

proper nounLongest (plural Longests)

plural Longests

  1. A surname.

Origin

  1. Proto-Indo-European*dlongʰos
  2. Proto-Germanic*langaz
  3. Proto-West Germanic*lang
  4. Old Englishlang
  5. Middle Englishlong
  6. Englishlong
  7. Englishlongest

From long + -est.

Full word history & related roots →

Rhymes & wordplay

Anagrams

songlet
Cite this entry
APA

longest. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/longest

MLA

“longest.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/longest. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “longest,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/longest.

Source: longest on Wiktionary, CC BY-SA 4.0.