1. 字面意思：有时在字面意思(denotation)之外还给出它的涵义(connotation). 当然我们也不能说英英字典一定比英汉字典好. 英汉字典也有它方便的地方,尤其当我们查动植物或某些物品名称的时候,

1. the most direct or specific meaning of a word or expression
    the class of objects that an expression refers to

    e.g. the extension of `satellite of Mars'' is the set containing only Demos and Phobos

    Synonym: referenceextension

2. the act of indicating or pointing out by name

    Synonym: indication