Webster's Revised Unabridged Dictionary · 1913

Demonstrative

Demonstrative , adjective

[French démonstratif, Latin 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
Collocations (1)
Demonstrative pronoun (Grammar) , a pronoun distinctly designating that to which it refers.

Demonstrative , noun

(Grammar) A demonstrative pronoun; as, “this” and “that” are demonstratives.