What does rabid mean?
Rabid is an adjective describing enthusiasm that is intense, fanatical, and often excessive. In everyday use, a rabid fan, supporter, or enthusiast is someone who expresses devotion with an almost aggressive or unreasonable energy. The word can sound flattering in contexts where passionate commitment is admired, but it is usually critical when describing behavior that seems obsessive, hysterical, or out of proportion. Rabid also has a specialized veterinary and medical meaning: an animal or, more rarely, a person infected with rabies. Because a rabid animal may transmit the disease through biting, this sense carries an unmistakable sense of danger. The word’s vivid history reflects its Latin ancestor, rabidus, meaning “raging” or “mad.” Today, both senses remain common, though the figurative use of intense enthusiasm is especially familiar in general conversation.
Extremely enthusiastic or fanatical to an excessive degree.
"She is a rabid advocate for environmental protection."
Often informal and mildly derogatory; it can imply that the enthusiasm is excessive or unreasonable.
Infected with rabies and therefore potentially dangerous.
"Animal control officers captured the rabid dog."
A formal medical and veterinary usage, especially applied to animals.
Rabid means wildly overexcited in modern English, but its original and still literal medical sense is frighteningly literal: suffering from rabies.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does rabid come from?
Rabid comes through Old French from Latin rabidus, an adjective meaning “raging,” “mad,” or “furious.” Latin rabidus is associated with rabere, “to rave” or “to be enthusiastic,” the same root that also underlies rage, rave, and rabies. The medical sense developed from the idea of mad or frenzied behavior associated with the disease, while the figurative sense emphasizes intense, often excessive enthusiasm.
Related word forms
How rabid is actually used
In its figurative sense, rabid is informal to mildly derogatory and often suggests an unreasonable or excessive degree of enthusiasm. Its medical sense is formal and technical.
Easily confused with rabid
Rabid means fanatically enthusiastic or infected with rabies, whereas rapid means happening quickly.