voc·a·tive /ˈvɑkətɪv/
  (a.)呼格的,呼喚的呼格
  Voc·a·tive a.  Of or pertaining to calling; used in calling; specifically Gram., used in address; appellative; -- said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed; as, Domine, O Lord.
  Voc·a·tive, n.  Gram. The vocative case.
  ◄ ►
  vocative
       adj : relating to a case used in some languages; "vocative verb
             endings"
       n : the case (in some inflected languages) used when the
           referent of the noun is being addressed [syn: vocative
           case]