名詞 demonstrative:

1. a pronoun that points out an intended referent
   同義詞：demonstrative pronoun

形容詞 demonstrative:

1. given to or marked by the open expression of emotion
2. serving to demonstrate
   同義詞：illustrative

1. He's very demonstrative; he kissed me on both cheeks.
   他熱情奔放，吻了我的雙頰。
2. "That" is a demonstrative pronoun.
   that是一個(gè)指示代詞。

de.mon.stra.tive

adj.（形容詞）
Serving to manifest or prove.
用于表明或證明的
Involving or characterized by demonstration.
論證的：包含證明或以證明為特征的
Given to or marked by the open expression of emotion:
感情外露的：具有公開(kāi)表示情感的特征的：
例句：
an affectionate and demonstrative family.
一個(gè)慈愛(ài)并且開(kāi)朗的家庭

Abbr. demon.,dem.Grammar Specifying or singling out the person or thing referred to:
縮寫(xiě) demon.,dem.【語(yǔ)法】 指代的，指示的：區(qū)分或挑選出所指的人或事的：
例句：
the demonstrative pronounsthese and that .
指示代詞these（這些） 和 that（那）

n.Abbr. demon.,dem.Grammar （名詞）縮寫(xiě) demon.,dem.【語(yǔ)法】
A demonstrative pronoun or adjective.
指示代詞或指示形容詞

【引伸】
demon.stratively
adv.（副詞）
demon.strativeness
n.（名詞）