Last Updated：2025/11/26
(grammar, X-bar theory) A phrase, or, equivalently, a node in a syntax tree, which consists either of: (1) an adjunct and another X-bar phrase, (2) a head, X, and an optional complement, or (3) a conjunction sandwiched between two other X-bars. The X is a pro-letter
which can be substituted by letters such as N for noun, V for verb, P for preposition, I for inflectional, etc.
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X-bar
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Source Word
X-bar
Noun
(grammar,
X-bar
theory)
A
phrase,
or,
equivalently,
a
node
in
a
syntax
tree,
which
consists
either
of:
(1)
an
adjunct
and
another
X-bar
phrase,
(2)
a
head,
X,
and
an
optional
complement,
or
(3)
a
conjunction
sandwiched
between
two
other
X-bars.
The
X
is
a
"pro-letter"
which
can
be
substituted
by
letters
such
as
N
for
noun,
V
for
verb,
P
for
preposition,
I
for
inflectional,
etc.
Japanese Meaning
文法・統語論における概念で、Xバー理論に基づくフレーズまたは統語木のノードを指します。具体的には、（1）修飾語と別のXバー句、（2）ヘッド（中心となる語）と任意の補語、または（3）2つのXバー句の間に挟まれた接続詞という構造から成り立ちます。ここでXはプロレターとして機能し、例えば名詞（N）、動詞（V）、前置詞（P）、活用（I）など、さまざまな品詞に対応する記号として用いられます。
Sense（1）
(grammar,
X-bar
theory)
A
phrase,
or,
equivalently,
a
node
in
a
syntax
tree,
which
consists
either
of:
(1)
an
adjunct
and
another
X-bar
phrase,
(2)
a
head,
X,
and
an
optional
complement,
or
(3)
a
conjunction
sandwiched
between
two
other
X-bars.
The
X
is
a
"pro-letter"
which
can
be
substituted
by
letters
such
as
N
for
noun,
V
for
verb,
P
for
preposition,
I
for
inflectional,
etc.
