“Demonstrative: A term used in association with pronouns and determiners as an adjective and a noun: a demonstrative pronoun; three demonstratives in one sentence. A demonstrative usage indicates relationships and locations, such as between this (near the speaker and perhaps the listener) and that (not near the speaker, perhaps near the listener, or not near either).”
Excerpted from: McArthur, Tom. The Oxford Concise Companion to the English Language. New York: Oxford University Press, 2005.