noun
Uncommon
sinus
SEYE-nuhs
Sinus (noun) means one of the air-filled cavities in the skull, especially around the nose, that connect to the nasal passages. Example: “Her sinus was blocked from the cold.”
noun
1
One of the air-filled cavities in the skull, especially around the nose, that connect to the nasal passages.
"Her sinus was blocked from the cold."
"He suffers from sinus pain every spring."
How to use sinus
Learner’s notesIn plain EnglishOne of the hollow spaces in your skull around the nose, often mentioned when they get blocked or infected.
Common pairings
sinus infection
sinus pressure
blocked sinus
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Word forms
- Plural
- sinuses
Fill the gap
Can you complete this real example?
Her _____ was blocked from the cold.
Etymology
A learned borrowing from Latin sinus, meaning "a curve, fold, or hollow."
Synonyms
View more →
fistula
venous sinus
Related words
Rhymes for sinus
See all rhymes for sinus →Frequently asked questions
What does “sinus” mean?
The word “sinus” means one of the air-filled cavities in the skull, especially around the nose, that connect to the nasal passages. In plain terms, one of the hollow spaces in your skull around the nose, often mentioned when they get blocked or infected.
How do you pronounce “sinus”?
“Sinus” is pronounced SEYE-nuhs (/ˈsaɪ.nəs/ in IPA).
How do you use “sinus” in a sentence?
Here is “sinus” used in a sentence: “Her sinus was blocked from the cold.”
What part of speech is “sinus”?
“Sinus” is a noun.
Where does the word “sinus” come from?
The word “sinus” comes from Latin. A learned borrowing from Latin sinus, meaning "a curve, fold, or hollow.".
Is “sinus” a common word?
“Sinus” is an uncommon word in modern English.
