a.

1. 感情流露的
   a demonstrative person

   感情外露的人

2. 示範的
3. 論證的，證明的[（+of）]
   The exhibition is demonstrative of many problems in the city.

   這一展覽說明了本市存在的許多問題。

4. 明確的，結論性的
5. 【語】指示的
   "This" is a demonstrative pronoun.

   "this"是指示代詞。

n.

1. 【語】指示詞[C]

adj.

1. tending to show affectionate or other feelings openly.
2. serving to demonstrate something.
3. Grammar  (of a determiner or pronoun) indicating the person or thing referred to (e.g. this, that, those).

n.