genius

American  

[jeen-yuhs] / ˈdʒin yəs /

noun

plural

geniuses, genii

1. an exceptional natural capacity of intellect, especially as shown in creative and original work in science, art, music, etc..

   the genius of Mozart.

   Synonyms:

   wit, ingenuity, intelligence

2. a person having such capacity.

3. a person having an extraordinarily high intelligence rating on a psychological test, as an IQ above 140.

   Synonyms:

   brainiac, brain, whiz, expert, master

   Antonyms:

   dope, half-wit, imbecile, idiot, ninny, nitwit, blockhead, numbskull, dolt, dullard, dunce, simpleton, fool, moron

4. natural ability or capacity; strong inclination.

   a special genius for leadership.

   Synonyms:

   flair, bent, knack, penchant, predilection, endowment, faculty, aptitude, talent, gift, wizardry

5. distinctive character or spirit, as of a nation, period, or language.

6. the guardian spirit of a place, institution, etc.

7. either of two mutually opposed spirits, one good and the other evil, supposed to attend a person throughout life.

8. a person who strongly influences for good or ill the character, conduct, or destiny of a person, place, or thing.

   Rasputin, the evil genius of Russian politics.

9. Islamic Mythology. jinn; genie.

10. genie.

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genius British  

/ ˈdʒiːnɪəs, -njəs /

noun

1. a person with exceptional ability, esp of a highly original kind

2. such ability or capacity

   Mozart's musical genius

3. the distinctive spirit or creative nature of a nation, era, language, etc

4. a person considered as exerting great influence of a certain sort

   an evil genius

5. Roman myth

   1. the guiding spirit who attends a person from birth to death

   2. the guardian spirit of a place, group of people, or institution

6. Arabian myth (usually plural) a demon; jinn

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Usage

Plural word for genius The plural form of genius can be either geniuses or genii, pronounced [ jee-nee-ahy ], depending on the intended meaning of the word. Geniuses is much more commonly used. The plural forms of several other singular words that end in -us are also formed in this way, such as virus/viruses, callus/calluses, and status/statuses. Irregular plurals that are formed like genii, such as radius/radii or cactus/cacti, derive directly from their original pluralization in Latin. However, the standard English plural -es is often also acceptable for these terms, as in radiuses and cactuses.

Etymology

Origin of genius

First recorded in 1350–1400; Middle English, from Latin: “tutelary deity or genius of a person”; genus

Explanation

Genius is an exceptional talent or skill, something above and beyond the norm. A genius is someone who possesses this brilliance, like a child prodigy who learned the piano at age 3 and played sold-out concerts by age 5. Genius comes from the Latin word of the same name, meaning "guardian deity or spirit which watches over each person from birth" or "innate ability." Your genius — your superior talent — at the game of chess could make you a world champion. Your amazing genius would also make you a genius. The word can be used more lightheartedly to describe a natural ability or flair for something. You may have a genius for putting together stylish outfits.

Example Sentences

Even in the hands of genius trainer Willie Mullins, he is hard to fancy.

From BBC • Apr. 9, 2026

“This world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children.”

From Salon • Apr. 7, 2026

The heady early years at Apple, wartime endurance in Britain, Motown’s hidden genius and more of the month’s best nonfiction.

From The Wall Street Journal • Mar. 31, 2026

Steve Jobs, a driven marketing genius, and Steve Wozniak, who invented the Apple computer, revolutionized how people use technology in the internet age and built a company now worth more than $3.6 trillion.

From Barron's • Mar. 29, 2026

But others, also using Yiddish, referred to him as a gaon, a genius.

From "Endgame" by Frank Brady

Related Words

• ability
• accomplishment
• acumen
• aptitude
• brilliance
• flair
• imagination
• ingenuity
• inspiration
• intelligence
• inventiveness
• originality
• prodigy
• prowess
• talent
• wisdom