run-on sentence

noun

A written sentence that inappropriately joins two (or more) independent clauses into a single sentence, often with only a comma as separator (comma splice), which should be rendered either as separate sentences or as clauses joined more appropriately (such as by a semicolon or by a comma and coordinating conjunction).

Meanings

nounrun-on sentence (plural run-on sentences)

plural run-on sentences

  1. grammarA written sentence that inappropriately joins two (or more) independent clauses into a single sentence, often with only a comma as separator (comma splice), which should be rendered either as separate sentences or as clauses joined more appropriately (such as by a semicolon or by a comma and coordinating conjunction).

    Synonyms: fused sentence

    1. grammarA written sentence with a coordinating conjunction but missing a comma.

      Synonyms: fused sentence

  2. Any very long, often also in other ways badly formed or even chaotic sentence.

Synonyms & antonyms

nounA written sentence that inappropriately joins two (or more) independent clauses into a single sentence, often with only a comma as separator (comma splice), which should be rendered either as separate sentences or as clauses joined more appropriately (such as by a semicolon or by a comma and coordinating conjunction).

nounA written sentence with a coordinating conjunction but missing a comma.

Origin

So called because the sentence runs on beyond the point where it should end.

Full word history & related roots →

Translations

German Bandwurmsatz
  • BandwurmsatzTranslations
Spanish oración mal puntuada, oración fusionada
  • oración mal puntuadaTranslations
  • oración fusionadaTranslations
  • oración continuaTranslations
Cite this entry
APA

run-on sentence. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/run-on%20sentence

MLA

“run-on sentence.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/run-on%20sentence. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “run-on sentence,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/run-on%20sentence.

Source: run-on sentence on Wiktionary, CC BY-SA 4.0.