violently agitated and turbulent; "boisterous winds and waves"; "the fierce thunders roar me their music"- Ezra Pound; "rough weather"; "rough seas" noisy and lacking in restraint or discipline; "a boisterous crowd"; "a social gathering that became rambunctious and out of hand"; "a robustious group of teenagers"; "beneath the rumbustious surface of his paintings is sympathy for the vulnerability of ordinary human beings"; "an unruly class" full of rough and exuberant animal spirits; "boisterous practical jokes"; "knockabout comedy
noisy and lacking in restraint or discipline; "a boisterous crowd"; "a social gathering that became rambunctious and out of hand"; "a robustious group of teenagers"; "beneath the rumbustious surface of his paintings is sympathy for the vulnerability of ordinary human beings"; "an unruly class"
Someone who is boisterous is noisy, lively, and full of energy. a boisterous but good-natured crowd Most of the children were noisy and boisterous. + boisterously bois·ter·ous·ly Her friends laughed boisterously, too. someone, especially a child, who is boisterous makes a lot of noise and has a lot of energy (boistous (14-16 centuries), from boistos)