denotation

英 [diːnəʊ'teɪʃn] 美[,dino'teʃən]

• n. 符号；表示；意义；指示

1. the act of indicating or pointing out by name

2. 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"