Definition of Boisterous: Boisterous (adjective): Noisy, energetic, and cheerful; rowdy. Often associated with lively and exuberant behavior. Synonyms: rambunctious, lively, exuberant, rowdy Antonyms: quiet, calm, subdued, restrained Memory Tip: Think of “boisterous” as “boys-terous,” imagining a group of boys being loud and full of energy, which perfectly captures the meaning. Conversation and Short Story Examples…