clueless
Americanadjective
adjective
Etymology
Origin of clueless
Explanation
Someone is clueless if they have no idea what's happening. The unsuspecting victim of a practical joke is usually clueless right up until everyone starts laughing. You could reassure your brother that your mom has no idea you're planning a surprise party by saying, "Don't worry, she's totally clueless." Or you might worry that your friend failed the big geometry test, based on the clueless expression on his face during the exam. In the 1860s, clueless meant "leaving no clues behind," but by 1943 it gained its current meaning, which became even more popular as student slang in the 1980s.
Vocabulary lists containing clueless
"Two Left Feet, Two Left Hands, and Too Left on the Bench"
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Insignificant Events in the Life of a Cactus
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Simon vs. the Homo Sapiens Agenda
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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.
“Commercial satellite companies, which provide the government with services, have detected Chinese activities and have alerted us. Otherwise, we’d be clueless about a lot of what’s going on.”
From Slate ● Sep. 17, 2026
Yardeni: Yes, absolutely, though I have never been a gold bug and am honestly clueless when it comes to valuing something with no coupon or dividend.
From MarketWatch ● Aug. 26, 2026
I certainly stood out among the perfectly creased khaki pants and palm combs and top-buttoned flannels contrasted with my clueless bowl haircut and Ninja Turtle suspenders.
From Los Angeles Times ● Aug. 6, 2026
"I burst out crying. We were clueless about the staff concerns when we went in there."
From BBC ● Jun. 16, 2026
Charlie cast me a questioning glance, but I was clueless.
From "We Are the Ants" by Shaun David Hutchinson
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.
