To dream about hornet is interpreted as the symbol of danger that the dreamer is going to face. Perhaps you gave up too fast. You need to pull yourself together and deal with the harsh situations in your waking life. If you have been stung by a hornet, then such dream represents the revenge you are going to give. You do not want to forgive and cant forget the harm someone made to you.
Dream dictionary: Hornets dream meanings
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 some- thing. A hornet 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 attacking hornets in a dream means a war with evil people.