クループMeanings1nouncroupmedicineMedical term for the respiratory condition, often used in pediatric contexts. Cross-referenced with クルップ, an alternative spelling.See also: クルップクループは主おもに幼よう児じに見みられる呼こ吸きゅう器き疾しっ患かんです。Croup is a respiratory illness mainly seen in young children.