Dictionary.com
Thesaurus.com
Synonyms

extremely

American  
[ik-streem-lee] / ɪkˈstrim li /

adverb

  1. in an extreme degree; exceedingly.

    extremely cold.


extremely British  
/ ɪkˈstriːmlɪ /

adverb

  1. to the extreme; exceedingly

  2. (intensifier)

    I behaved extremely badly

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What does extremely mean? Extremely means to a very great degree—exceedingly. Instead of saying I’m very very tired, you could say I’m extremely tired. Extremely is the adverb form of the adjective extreme, which means of the highest degree or intensity. Extremely is almost always used to modify (describe) adjectives and almost never verbs. It emphasizes or intensifies the meaning of the adjective and indicates that its level is far beyond the ordinary.Example: At some times during the winter, it gets so extremely cold here that it’s dangerous to go outside for more than a minute.

Etymology

Origin of extremely

First recorded in 1525–35; extreme + -ly

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.

To investigate these strange behaviors, scientists used extremely fast x-ray pulses generated by powerful lasers in South Korea.

From Science Daily

At extremely small scales, atoms can shift positions or fill gaps, which can erase stored data.

From Science Daily

I didn’t fully become One with a ring until this January when my extremely fit, pickleball-playing sister-in-law bowed out one morning from a family hike at the urging of her ring.

From The Wall Street Journal

“The Forsytes” is inspired by Galsworthy’s family of extremely wealthy stockbrokers in late-Victorian London, an age in which nobility’s influence and social dominance receded with the rise of new money.

From Salon

“The situation surrounding Japan is now extremely severe.”

From The Wall Street Journal