sinusitis

American

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

noun

Pathology.

inflammation of a sinus or the sinuses.

sinusitis British

/ ˌsaɪnəˈsaɪtɪs /

noun

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; 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.

NHS England said patients can get prescription-only medication – traditionally dispensed by GPs – at pharmacies for a range of common conditions, including a sore throat, sinusitis and earache.

From BBC • Dec. 3, 2025

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

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

Despite the existence of vaccines against pneumococcal infections such as otitis media, sinusitis, and meningitis, the prevalence of pneumococcal pneumonia remains high.

From Science Daily • Nov. 28, 2023

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023