1.Definition: full of rough and exuberant animal spirits

"Boisterous practical jokes"

Related Adjective(s):knockabout

2.Definition: noisy and lacking in restraint or discipline

"A boisterous crowd"

Related Adjective(s):rambunctious, robustious, rumbustious, unruly

3.Definition: violently agitated and turbulent

"Boisterous winds and waves"

Related Adjective(s):fierce, rough