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From Latin strīdor (shrill or harsh sound), from strīdō (make a shrill or harsh sound).



stridor (countable and uncountable, plural stridors)

  1. A harsh, shrill, unpleasant noise.
    1891 But when the tilted plank let slide its freight into the sea, a second strange human murmur was heard, blended now with another inarticulate sound proceeding from certain larger sea-fowl, whose attention having been attracted by the peculiar commotion in the water resulting from the heavy sloped dive of the shotted hammock into the sea, flew screaming to the spot. So near the hull did they come, that the stridor or bony creak of their gaunt double-jointed pinions was audible. Herman Melville, Billy Budd, Chapter 28.
  2. (medicine) A high-pitched sound heard on inspiration resulting from turbulent air flow in the upper airway usually indicative of serious airway obstruction.
    • 1973, Oliver Sacks, Awakenings, New York: Vintage, 1999, p. 50,
      Her breath-holding increased in duration to almost a minute; her expirations became complicated by stridor, forced retching, and forced phonations ('Oouuggh!').

Derived termsEdit


  • stridor” in Douglas Harper, Online Etymology Dictionary, 2001–2019.




strīdor m (genitive strīdōris); third declension

  1. A harsh, shrill, hissing, grating, or creaking sound


Third-declension noun.

Case Singular Plural
Nominative strīdor strīdōrēs
Genitive strīdōris strīdōrum
Dative strīdōrī strīdōribus
Accusative strīdōrem strīdōrēs
Ablative strīdōre strīdōribus
Vocative strīdor strīdōrēs