Of or pertaining to a theater or scenic representations; resembling the manner of dramatic performers: as, theatrical performances; theatrical gestures.Calculated for display; extravagant; showy; pretentious: as, a theatrical flourish.Artificial; affected; assumed.n. plural All that pertains to a dramatic performance; also, a dramatic performance itself: applied usually to amateur performances; as, to engage in private theatricals (a dramatic performance in a private house).n. A professional actor.