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sinusitis

American  
[sahy-nuh-sahy-tis] / ˌsaɪ nəˈsaɪ tɪs /

noun

Pathology.
  1. inflammation of a sinus or the sinuses.


sinusitis British  
/ ˌsaɪnəˈsaɪtɪs /

noun

  1. inflammation of the membrane lining a sinus, esp a nasal sinus

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sinusitis

From New Latin, dating back to 1900–05; see origin at sinus, -itis

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Antibiotic use is driven largely by common colds, which produce secondary bacterial things like sore throat, earache, nasal congestion, sinusitis.

From Slate Oct. 8, 2025

Queen Camilla has pulled out of attending the funeral of Katharine, the Duchess of Kent, with "deep regret", with Buckingham Palace saying she is recovering from acute sinusitis.

From BBC Sep. 16, 2025

Barometric pressure sinusitis, otherwise known as barosinusitis, is an established medical condition in which people feel intense sinus headaches and inflammation.

From Los Angeles Times Jun. 17, 2024

That includes veterans suffering from cancer, allergic rhinitis, bronchial asthma, hypertension, sinusitis and other conditions, often related to the respiratory system.

From New York Times May 21, 2024

His most troubling conditions were a strangely recurrent viral pneumonia, chronic sinusitis, and the ulcerative colitis that had laid him low the weekend before his scheduled testimony against Oppenheimer.

From "Big Science" by Michael Hiltzik

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