De‐mon″stra‐tive (?), a. [F. démonstratif, 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.