Boisterous means noisy, rough and full of energy. A boisterous crowd, boisterous children, boisterous laughter.
It is cheerful rather than threatening — boisterous behaviour is exhausting and not dangerous, which is why it is used of children and of parties. Of weather and sea it means rough. Note that the origin is uncertain, from a Middle English word meaning crude or unrefined.
1adjectiveboisterousNoisy, rough and full of energy.
“The boisterous boys chased each other around the garden, shouting and laughing.”
synonyms: rowdy, rambunctious
boisterous is a quality of noisy energy.
Middle English boistres alters boistous, meaning crude or rough. Its ultimate origin is unknown.
Middle English
boistres
English, today
boisterous
Built from
From Middle English boistres, an alteration of Middle English boistous (“crude, unrefined”), of unknown origin. Likely from Anglo-Norman boystous, bustous (“rough, in a crude state, disabled, paralysed, unable to walk, lame”), Old French boitous (“limping; having a rough, uneven surface”).
Etymology from Wiktionary, CC BY-SA