• A category of psychiatric disorders which are characterized by anxious feelings or fear often accompanied by physical symptoms associated with anxiety.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• General term for the group of specific, anxiety-related, avoidance- prone disorders listed as NTs.
  CRISP Thesaurus
  National Institutes of Health, 2006
• Persistent and disabling ANXIETY.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Everyone periodically experiences fear and anxiety. Fear is an emotional, physical, and behavioral response to an immediately recognizable external threat (eg, an intruder, a car spinning on ice).
  Merck Manuals
  Merck & Co., Inc., 2020
• Anxiety disorders are common psychiatric disorders. Many patients with anxiety disorders experience physical symptoms related to anxiety and subsequently visit their primary care providers.
  Medscape
  WebMD, 2019
• Experiencing occasional anxiety is a normal part of life. However, people with anxiety disorders frequently have intense, excessive and persistent worry and fear about everyday situations. Often, anxiety disorders involve repeated episodes of sudden feelings of intense anxiety and fear or terror that reach a peak within minutes (panic...
  Mayo Clinic
  Mayo Foundation for Medical Education and Research
• Anxiety disorder, any of several disorders that are characterized by a feeling of fear, dread, or apprehension that arises without a clear or appropriate cause. Anxiety normally is an adaptive mechanism that signals a potentially harmful internal or external change and thereby enables individuals...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020