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[sahy-nuh-sahy-tis] /ˌsaɪ nəˈsaɪ tɪs/
noun, Pathology
inflammation of a sinus or the sinuses.
Origin of sinusitis
1900-05; < New Latin; see sinus, -itis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for sinusitis
  • He developed chronic sinusitis, and needed to get surgery to clean the infection.
  • sinusitis can also be dangerous if it persists and the infection spreads.
  • Acute rhino-sinusitis is an inflammatory condition of one or more of the para-nasal cavities that usually lasts up to four weeks.
  • If the taste problem is due to allergies or sinusitis, the doctor may give you medicine to relieve the stuffy nose.
  • The nasal spray may cause nosebleeds, sinusitis, and inflammation of the membranes in the nose.
  • Patients who do not respond or who have severe sinusitis should receive antibiotics.
British Dictionary definitions for sinusitis


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
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Word Origin and History for sinusitis

"inflammation of the sinuses," 1896; see sinus + -itis.

Online Etymology Dictionary, © 2010 Douglas Harper
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sinusitis in Medicine

sinusitis si·nus·i·tis (sī'nə-sī'tĭs)
Inflammation of the mucous membrane of a sinus, especially of the paranasal sinuses.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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