hyperventilation

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˌhaɪpərvɛntɪˈleɪʃən/

US:USA pronunciation: IPAUSA pronunciation: IPA/ˌhaɪpɚˌvɛntəˈleɪʃən/

US:USA pronunciation: respellingUSA pronunciation: respelling(hī′pər ven′tl āshən)



WordReference Random House Learner's Dictionary of American English © 2026
hy•per•ven•ti•la•tion /ˌhaɪpɚˌvɛntəˈleɪʃən/USA pronunciation   n. [uncountable]
  1. Pathologyabnormally rapid or deep breathing that goes on too long, resulting in too much oxygen in the blood.

WordReference Random House Unabridged Dictionary of American English © 2026
hy•per•ven•ti•la•tion  (hī′pər ven′tl āshən),USA pronunciation n. 
  1. Physiologyexcessively rapid and deep breathing.
  2. Pathology, Physiologya condition characterized by abnormally prolonged and rapid breathing, resulting in decreased carbon dioxide levels and increased oxygen levels that produce faintness, tingling of the fingers and toes, and, if continued, alkalosis and loss of consciousness.
  • hyper- + ventilation 1925–30

Collins Concise English Dictionary © HarperCollins Publishers::
hyperventilation /ˌhaɪpəˌvɛntɪˈleɪʃən/ n
  1. an increase in the depth, duration, and rate of breathing, sometimes resulting in cramp and dizziness
'hyperventilation' also found in these entries (note: many are not synonyms or translations):

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