1 文書を見つけるための辞書。

• number
• 数, 番号, 件数
• the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural); "in English the subject and the verb must agree in number"
• 実体の数に応じて使われる名詞、代名詞と動詞の形の文法的範疇（単数形、両数形、または複数形）