na-adjective, noun
Describes something dramatic, exaggerated, or characteristic of the theater. Used as a な-adjective or noun.
彼の謝罪はあまりにもシアトリカルで、本心とは思えなかった。
His apology was so theatrical that I couldn't believe it was sincere.
その演出はシアトリカルな効果を狙っている。
The staging aims for a theatrical effect.