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1. Serving to manifest or prove.
2. Involving or characterized by demonstration.
3. Given to or marked by the open expression of emotion: an affectionate and demonstrative family.
4. Grammar Specifying or singling out the person or thing referred to: the demonstrative pronouns these and that.
n. Grammar
A demonstrative pronoun or adjective.

de·mon′stra·tive·ly adv.
de·mon′stra·tive·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.demonstrativeness - tending to express your feelings freely
emotionalism, emotionality - emotional nature or quality
References in classic literature ?
He was too happy when she volunteered to kiss him to mind by what means he got her demonstrativeness.
Distinctive features of patients with hypertension were demonstrativeness and hyperthymity.
In their case, the most important determining or accelerating factors are taste and smell alterations (they emerge mainly as side effects of long-term use of certain pharmacological products), residual mental disorders left untreated during younger years, cognitive deficit, bereavement, loneliness (easily entailing depression), and demonstrativeness (to draw the attention of others) (7, 8).
The concept of appeal points to demonstrativeness traits in the personality of these subjects, who, often enough, are histrionic personalities.
This section will also explore how Adela's concept of "mass" as a symbolic force can work toward the demonstrativeness of Williams's narrative objectives.