Last Updated
：2025/11/19
ordinal number
Noun
Japanese Meaning
（文法）項目の順序や相対的な位置を示す語、例として「第一」「第二」など、順番を示す表現として使われる。 / （算術）順序や位置を示すために用いられる自然数、たとえば配列中の位置を表すために用いられる数。
Sense（3）
(set
theory)
Such
a
number
generalised
to
correspond
to
any
cardinal
number
(the
size
of
some
set);
formally,
the
order
type
of
some
well-ordered
set
of
some
cardinality
a,
which
represents
an
equivalence
class
of
well-ordered
sets
(exactly
those
of
cardinality
a)
under
the
equivalence
relation
"existence
of
an
order-preserving
bijection".
（ plural ）
Quizzes for review
(grammar) A word that expresses the relative position of an item in a sequence. / (arithmetic) A natural number used to denote position in a sequence.
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In grammar class, the term ordinal number helps students describe positions like first, second, and third.
See correct answer
In grammar class, the term ordinal number helps students describe positions like first, second, and third.
音声機能が動作しない場合はこちらをご確認ください
English - English
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