extreme

American  

[ik-streem] / ɪkˈstrim /

adjective

extremer, extremest

1. of a character or kind farthest removed from the ordinary or average.

   extreme measures.

2. utmost or exceedingly great in degree.

   extreme joy.

   Synonyms:

   superlative

3. farthest from the center or middle; outermost; endmost.

   the extreme limits of a town.

   Synonyms:

   uttermost, last, ultimate

4. farthest, utmost, or very far in any direction.

   an object at the extreme point of vision.

5. exceeding the bounds of moderation.

   extreme fashions.

6. going to the utmost or very great lengths in action, habit, opinion, etc..

   an extreme conservative.

   Synonyms:

   unreasonable, uncompromising, fanatical, excessive, immoderate, extravagant

   Antonyms:

   moderate

7. last or final.

   extreme hopes.

8. Chiefly Sports. very dangerous or difficult.

   extreme skiing.

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noun

1. the utmost or highest degree, or a very high degree.

   cautious to an extreme.

2. one of two things as remote or different from each other as possible.

   the extremes of joy and grief.

3. the furthest or utmost length; an excessive length, beyond the ordinary or average.

   extremes in dress.

4. an extreme act, measure, condition, etc..

   the extreme of poverty.

5. Mathematics.

   1. the first or the last term, as of a proportion or series.

   2. a relative maximum or relative minimum value of a function in a given region.

6. Logic. the subject or the predicate of the conclusion of a syllogism; either of two terms that are separated in the premises and brought together in the conclusion.

7. Archaic. the utmost point, or extremity, of something.

extreme British  

/ ɪkˈstriːm /

adjective

1. being of a high or of the highest degree or intensity

   extreme cold

   extreme difficulty

2. exceeding what is usual or reasonable; immoderate

   extreme behaviour

3. very strict, rigid, or severe; drastic

   an extreme measure

4. (prenominal) farthest or outermost in direction

   the extreme boundary

5. meteorol of, relating to, or characteristic of a continental climate

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noun

1. the highest or furthest degree (often in the phrases in the extreme, go to extremes )

2. (often plural) either of the two limits or ends of a scale or range of possibilities

   extremes of temperature

3. maths

   1. the first or last term of a series or a proportion

   2. a maximum or minimum value of a function

4. logic the subject or predicate of the conclusion of a syllogism

Related Words

See radical.

Other Word Forms

• extremeness noun
• overextreme adjective
• quasi-extreme adjective
• superextreme adjective
• superextremely adverb
• superextremeness noun
• unextreme adjective

Etymology

Origin of extreme

First recorded in 1425–75; late Middle English, from Latin extrēmus “most outward,” superlative of exterus “outward”; see exterior

Explanation

Something extreme is far out, either in terms of distance or intensity. Extreme sports are wild or dangerous, and an extreme height is very high. When you talk about extreme things, you're talking about things that are very, very...something. An extreme point is the farthest distance from a place. Extreme eating is a type of contest — like hot dog-eating — in which people eat a freakish amount of food to compete with each other. An extreme biker is biking down dangerously steep mountain sides. Anything extreme is pushing the limits and taking things about as far as they can go.

Example Sentences

The miniature versions have fewer than 1,000 pieces, including a purple lightning bolt for the extreme ultraviolet light—and a Lego figurine dressed in a bunny suit.

From The Wall Street Journal • Apr. 20, 2026

Extreme weather at British festivals often makes headlines, such as Download getting flooded or Boomtown attendees being warned about extreme heat.

From BBC • Apr. 17, 2026

Sanders suffered injuries, including a concussion, headaches, possible traumatic brain injury, back and tailbone injuries and extreme mental anguish.

From Los Angeles Times • Apr. 17, 2026

"This includes instances of extreme weather such as heavy rainfall events or very warm summers triggering earlier than expected surges, suggesting an increasing unpredictability in their behavior."

From Science Daily • Apr. 17, 2026

A hundred scenarios passed through my head—him letting go, me falling, everyone seeing my extreme humiliation—but even though Oliver was on Team Rachel, no one in that group was mean, exactly.

From "Bye Forever, I Guess" by Jodi Meadows

Related Words

• absolute
• dire
• drastic
• egregious
• exaggerated
• exceptional
• excessive
• extraordinary
• harsh
• irrational
• outrageous
• radical
• remarkable
• severe
• sheer
• unreasonable
• unusual
• utter