Phrase guide

X-bar theory

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

A theory that posits a common syntactic structure for different lexical categories. Each phrase (XP) is the projection of a head (X) and may optionally include a specifier (sister of X-bar, daughter of XP), adjuncts (sister and daughter of X-bar) and complements (sister of X, daughter of X-bar).

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

X signifies an arbitrary lexical category; certain structures are represented by this letter and an overbar.

Across languages

Translations

6 source translations are retained for this English entry.

  • Chinese Mandarin: X槓理論 /X杠理论 (X-gàng lǐlùn) — theory
  • Chinese Mandarin: X階理論 /X阶理论 (X-jiē lǐlùn) — theory
  • Chinese Mandarin: X標槓理論 /X标杠理论 (X-biāogàng lǐlùn) — theory
  • French: théorie X-barre — theory
  • Polish: teoria X-bar — theory
  • Russian: X-штрих-теория (X-štrix-teorija) — theory