Try Our Apps


Avoid these words. Seriously.


near-earth object.


a combining form meaning “new,” “recent,” “revived,” “modified,” used in the formation of compound words:
neo-Darwinism; Neolithic; neoorthodoxy; neophyte.
Chemistry. a combining form used in the names of isomers having a carbon atom attached to four carbon atoms:
Also, especially before a vowel, ne-.
Origin of neo-
< Greek, combining form of néos; akin to new Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for NEO
Contemporary Examples
Historical Examples
  • It was in the NEO valley that the supreme efforts of the earthquake were manifested.

  • Remembering NEO's suggestion, I took also two other bottles of rum.

  • Hypatia started, as at a new thought, and confessed—as every NEO—Platonist would have done—that she had never done so.

    Hypatia Charles Kingsley
  • A few miles after entering the NEO valley, the throw of the fault reaches its maximum at Midori.

  • These we ate while NEO discoursed sadly upon the evil times that had befallen his reign.

  • “He got litt'ee broomee, an' sweep paint out litt'ee pipe on thing make ship's sails,” NEO explained.

British Dictionary definitions for NEO


combining form
(sometimes capital) new, recent, or a new or modern form or development: neoclassicism, neocolonialism
(usually capital) the most recent subdivision of a geological period: Neogene
Word Origin
from Greek neos new
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
Cite This Source
Contemporary definitions for NEO's 21st Century Lexicon
Copyright © 2003-2014, LLC
Cite This Source
Word Origin and History for NEO


word-forming element meaning "new, recent," used in a seemingly endless number of adjectives and nouns, mostly coined since c.1880, from Greek neo-, comb. form of neos "new, young, youthful; fresh, strange; lately, just now," from PIE root *newo- (see new).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
NEO in Medicine

neo- pref.

  1. New; recent: neonatal.

  2. New and different: Neo-Freudian.

  3. New and abnormal: neoplasm.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Nearby words for neo

Difficulty index for NEO

Some English speakers likely know this word

Word Value for NEO

Scrabble Words With Friends