n.
指示代词

[ noun ]
a pronoun that points out an intended referent
<noun.communication>

Demonstrative \De*mon"stra*tive\, a. [F. d['e]monstratif, L.
demonstrativus.]
1. Having the nature of demonstration; tending to
demonstrate; making evident; exhibiting clearly or
conclusively. ``Demonstrative figures.'' --Dryden.

An argument necessary and demonstrative. --Hooker.

2. Expressing, or apt to express, much; displaying feeling or
sentiment; as, her nature was demonstrative.

3. Consisting of eulogy or of invective. ``Demonstrative
eloquence.'' --Blair.

{Demonstrative pronoun} (Gram.), a pronoun distinctly
designating that to which it refers.