brainiac
Brainiac (noun) means Informal: a very intelligent, studious person. Example: “Her older brother was a total brainiac who finished school two years early.”
How to use brainiac
Learner’s notesIn plain EnglishA casual, often affectionate term for someone very smart or bookish.
Informal — fine in conversation, too casual for formal writing.
Word forms
brainiacs plural
Fill the gap
Can you complete this real example?
Her older brother was a total _____ who finished school two years early.
Etymology
A blend of brain and maniac, popularized by the name of a supervillain in the Superman comics from 1958.
Synonyms
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Rhymes for brainiac
Frequently asked questions
What does “brainiac” mean?
The word “brainiac” means informal: a very intelligent, studious person. In plain terms, a casual, often affectionate term for someone very smart or bookish.
How do you pronounce “brainiac”?
“Brainiac” is pronounced BRAY-nee-ak (/ˈbɹeɪniæk/ in IPA).
How do you use “brainiac” in a sentence?
Here is “brainiac” used in a sentence: “Her older brother was a total brainiac who finished school two years early.”
What part of speech is “brainiac”?
“Brainiac” is a noun.
Where does the word “brainiac” come from?
The word “brainiac” dates back to around 1958. A blend of brain and maniac, popularized by the name of a supervillain in the Superman comics from 1958.