Definition of bronchiectasis in US English:



  • Abnormal widening of the bronchi or their branches, causing a risk of infection.

    • ‘Bronchial casts have been described in various disorders, including asthma, allergic bronchopulmonary aspergillosis, cystic fibrosis, and bronchiectasis.’
    • ‘Babies with whooping cough can develop pneumonia, bronchiectasis (pockets of infection form in the small airways of the lungs) and/or collapsed lung.’
    • ‘Hypersecretion is an important feature in many chronic airway diseases, including COPD, cystic fibrosis, bronchiectasis, and acute asthma.’
    • ‘COPD is a subset of obstructive lung diseases that also includes cystic fibrosis, bronchiectasis and asthma.’
    • ‘A hallmark of H. influenzae infections in bronchiectasis and COPD is their propensity for recurrence.’


Late 19th century: from Greek bronkhia (denoting the branches of the main bronchi) + ektasis ‘dilatation’.