Hornet/ˈhɔːrnɪt/ Definition 1 of 2Pro Tip 1/3Danger Association The word 'hornet' often implies danger or aggression due to its powerful sting. She reacted like she had kicked a hornet's nest, full of rage. Pro Tip 2/3Nest Caution Mentioning a hornet's nest can suggest a problematic or volatile situation. Arguing in that meeting was like poking a hornet's nest. Pro Tip 3/3Cultural Metaphor 'Stirring up a hornet's nest' is a common metaphor for causing trouble. His controversial article stirred up a real hornet's nest online.