In a demonstrative manner.

The state or quality of being demonstrative.

simple past tense and past participle of demonstrate

One who demonstrates anything, or proves beyond doubt. / The forefinger. / One who takes part in a demonstration; a protester. / One who demonstrates products in a retail environment; a merchandiser.

that serves to demonstrate, show or prove / given to open displays of emotion / (grammar) that specifies the thing or person referred to

A demonstrative adjective. / A demonstrative pronoun.

present participle of demonstrate

Able to be demonstrated.

Something that can be demonstrated.

plural of demonstrability