1 文書を見つけるための辞書。

• denotation, reference, extension
• デノテーション, 外延
• the most direct or specific meaning of a word or expression; the class of objects that an expression refers to; "the extension of `satellite of Mars' is the set containing only Demos and Phobos"
• 語で最も直接的であるか特定の意味または表現