sinusitis

noun si·nus·i·tis \ ˌsīn-yə-ˈsī-təs , ˌsī-nə- \
|Updated on: 13 Jul 2018

Definition of sinusitis

: inflammation of a sinus of the skull

Recent Examples of sinusitis from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sinusitis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sinusitis

1896

in the meaning defined above

See Words from the same year
NEW! Time Traveler

SINUSITIS Defined for English Language Learners

sinusitis

Definition of sinusitis for English Language Learners

  • medical : painful swelling of the tissues inside the sinuses


Medical Dictionary

sinusitis

noun si·nus·itis \ ˌsī-n(y)ə-ˈsīt-əs \

medical Definition of sinusitis

: inflammation of a sinus of the skull


Seen and Heard

What made you want to look up sinusitis? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

in proportion

Get Word of the Day daily email!

Test Your Vocabulary

Test Your Emoji Exceptionalism

  • test-your-emoji-exceptionalism-written-with-a-lot-of-emoji
  • What is this emoji intended to represent: 🤳
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!