a. [ F. démonstratif, L. demonstrativus. ]
An argument necessary and demonstrative. Hooker. [ 1913 Webster ]
Demonstrative pronoun (Gram.),
n. (Gram.) A demonstrative pronoun;
adv. In a manner fitted to demonstrate; clearly; convincingly; forcibly. [ 1913 Webster ]
n. The state or quality of being demonstrative. [ 1913 Webster ]