1. of or pertaining to actors or acting. (adj)
2. deliberately affected or self-consciously emotional; overly dramatic, in behavior or speech. (adj)
3. an actor. (noun)
Example: The actress complained that her co-star was too histrionic, but she herself was the bigger attention-seeker.
Origin: 1640–50; < L. Latin histrōnicus of actors, equiv. to histriōn- (s. of histriō) actor (said to be < Etruscan) + -icus -ic