<p><strong>Adjective</strong></p><ul><li>characterized by or given to open exhibition or expression of one's emotions, attitudes, etc., especially of love or affection: She wished her fiancé were more demonstrative.</li><li>serving to demonstrate; explanatory or illustrative.</li><li>serving to prove the truth of anything; indubitably conclusive.</li><li>(Grammar) indicating or singling out the thing referred to. This is a demonstrative pronoun.</li></ul><p><strong>Noun</strong></p><ul><li>(Grammar) a demonstrative word, as this or there.</li></ul>