febrile
Americanadjective
adjective
Usage
What does febrile mean? Febrile is a more formal way of saying feverish—having a fever. A fever is an abnormally high body temperature, typically as the result of illness. In general, febrile can mean somehow related to or marked by fever. It is commonly used in formal medical contexts, but it can also be used metaphorically to describe situations marked by a state of anxious excitement. Example: Nothing is worse than the febrile sweat that comes with the flu.
Other Word Forms
Etymology
Origin of febrile
1645–55; < New Latin, Medieval Latin febrīlis. See fever, -ile
Compare meaning
How does febrile compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
Febrile is an adjective that means "related to fever." It can be used in a medical sense when someone is sick and running a temperature, or in a figurative sense to describe a state of excitement or energy. When febrile is used to describe a fever due to illness, it is often used together with the word seizure. A febrile seizure is a seizure triggered by a fever. In a non-medical sense, the word can describe a state of excitement, as in, "The atmosphere in the city was febrile as the king's coronation date approached." You might think the fe in the word sounds like "fee," but it is actually pronounced "feh," as in February.
Vocabulary lists containing febrile
Term-ometer: Synonyms for "Hot"
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Unbroken
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The Hot Zone
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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.
Mr. Hernández has a febrile energy that finds him bounding around the stage with a convincingly youthful, manic intensity, as if new love has pushed his adrenaline into overdrive.
From The Wall Street Journal ● Jun. 12, 2026
Muddy pitches, febrile home crowds and the Premier League's biggest stars taken far beyond their comfort zones.
From BBC ● Mar. 9, 2026
The rationale is understandable given the current febrile markets, they say.
From The Wall Street Journal ● Feb. 6, 2026
A pumped-up Volkanovski, a former rugby league player, basked in the adoration of the febrile 20,000-person crowd at Qudos Bank Arena in his first world title defence on Australian soil.
From Barron's ● Feb. 1, 2026
“When Peter came to me, he was febrile, but he was very with it, very alert and communicative. We gave him an X ray. His lungs were fluffy.”
From "The Hot Zone" by Richard Preston
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
