• Persistent abnormal dilatation of the bronchi owing to localized and irreversible destruction and widening of the large airways.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2021
• Segmental dilation of the bronchial tree.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• Segmental, irreversible dilation of the bronchial tree resulting in the accumulation of secretions which leads to obstruction. The most common cause is bacterial infection.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• Bronchiectasis is dilation and destruction of larger bronchi caused by chronic infection and inflammation. Common causes are cystic fibrosis, immune defects, and recurrent infections, though some cases seem to be idiopathic. Symptoms are chronic cough and purulent sputum expectoration; some patients may also have fever and dyspnea....
  Merck Manuals
  Merck & Co., Inc., 2020
• Bronchiectasis is an uncommon disease, most often secondary to an infectious process, that results in the abnormal and permanent distortion of one or more of the conducting bronchi or airways. In 1950, Reid characterized bronchiectasis as cylindrical, cystic, or varicose in nature.
  Medscape
  WebMD, 2019
• Bronchiectasis is the permanent dilation of bronchi due to the destruction of the elastic and muscular components of the bronchial wall. It is often caused as a consequence of recurrent and/or severe infections secondary to an underlying disorder. The majority of patients will present with a chronic cough and sputum production.
  Epocrates
  Athenahealth, Inc., 2019