Islamic Interpretation of Dreams (Ibn-i Sirin):

A hornet in a dream represents a fighting enemy, a builder, an architect, a thief, a highway robber, a despicable person whose earnings are unlawful, a singer who sings in the wrong key, eating poisonous food, or disclosing something.

Ahornet in a dream also represents a slanderer, a troublemaker, a strong fighter, a strong enemy that will argue against the truth, or merciless people, a vile person, a blood thirsty person, a stinging personality, or a harmful connection. Fighting attackinghornets in a dream means a war with evil people.