What does curious mean?
Curious is an adjective with two related but distinct uses. Its dominant sense describes a person who is eager to learn or know something — someone who asks questions, explores, and wants to understand how things work. In this sense it is overwhelmingly positive, associated with intelligence, open-mindedness, and a lively mind; phrases such as 'curious about science' are common in everyday speech and writing. The second, older sense applies to things rather than people: a 'curious' fact, sight, or coincidence is one that is strange, unusual, or puzzling enough to attract attention. Derived from the Latin 'curiosus', rooted in 'cura' (care), the word originally connoted taking pains over something before shifting toward eager inquiry and, later, oddity. It is a versatile word that appears everywhere from casual conversation to scientific writing, and its derivative noun, 'curiosity', has become shorthand for the very impulse to explore and understand the world.
Eager to know or learn something; showing inquisitiveness.
"He was curious about what lay beyond the mountains."
Often followed by 'about' plus the object of interest.
Strange, unusual, or remarkable; arousing interest or surprise.
"There was a curious silence in the house that evening."
The word 'curious' comes straight from Latin 'cura' — meaning care — because to be curious was originally to take careful pains over something.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of curious
Curious derives from the Latin 'curiosus', meaning careful or painstaking, itself built on 'cura', meaning care or concern. The word entered Middle English in the 14th century through Old French, initially carrying senses of being carefully made or attentively done. Over time its meaning shifted toward eager desire for knowledge, and by the early modern period it had also acquired the sense of something strange or remarkable. It shares its root with words such as 'curator', 'cure', and 'procure'.
Related word forms
How curious is actually used
'Curious' is neutral to positive when describing a desire to learn, and is widely used in both formal and informal contexts. In its second sense ('strange'), it carries a slightly literary flavor. 'Curiouser', famously used by Lewis Carroll in Alice's Adventures in Wonderland, is not standard English.
Easily confused with curious
'Curios' is a noun referring to rare or unusual objects collected as ornaments, while 'curious' is an adjective describing eagerness to know or something odd.