People who are demonstrative easily and clearly show their emotions. A demonstrative person might shout "Hooray" and jump for joy at good news. A non-demonstrative person might feel no less excited, but refrain from demonstrating it.

To demonstrate means to show, so think of demonstrative as showing. In legal terms, demonstrative is used to describe evidence that shows that something happened––a note that says "I did it" might show, or demonstrate, an accused person's guilt. In grammar, demonstrative pronouns––this, that, these, those––indicate the thing or person that is being pointed out, or shown, as in “Officer, it was ‘that’ man who stole my purse!”

Definitions of demonstrative

n a pronoun that points out an intended referent

demonstrative pronoun
Type of:
a function word that is used in place of a noun or noun phrase

adj serving to demonstrate

informative, instructive
serving to instruct or enlighten or inform

adj given to or marked by the open expression of emotion

“an affectionate and demonstrative family”
effusive, gushing, gushy
extravagantly demonstrative
epideictic, epideictical
designed primarily for rhetorical display
not cautious or reticent
not given to open expression of emotion
restrained, reticent, unemotional
cool and formal in manner
marked by self-restraint and reticence
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