one

[ wuhn ]
/ wʌn /

adjective

noun

pronoun


Nearby words

  1. ondes martenot,
  2. ondine,
  3. onding,
  4. ondo,
  5. ondograph,
  6. one and all,
  7. one and only,
  8. one and the same,
  9. one another,
  10. one by one

Idioms

Origin of one

before 900; Middle English oon, Old English ān; cognate with Dutch een, German ein, Gothic ains, Latin ūnus (OL oinos); akin to Greek oínē ace on a die

Can be confusedone wan won (see usage note at the current entry)

Usage note

One as an indefinite pronoun meaning “any person indefinitely, anyone” is more formal than you, which is also used as an indefinite pronoun with the same sense: One (or you ) should avoid misconceptions. One (or you ) can correct this fault in three ways. When the construction requires that the pronoun be repeated, either one or he or he or she is used; he or he or she is the more common in the United States: Wherever one looks, he (or he or she ) finds evidence of pollution. In speech or informal writing, a form of they sometimes occurs: Can one read this without having their emotions stirred?
In constructions of the type one of those who (or that or which ), the antecedent of who is considered to be the plural noun or pronoun, correctly followed by a plural verb: He is one of those people who work for the government. Yet the feeling that one is the antecedent is so strong that a singular verb is commonly found in all types of writing: one of those people who works for the government. When one is preceded by only in such a construction, the singular verb is always used: the only one of her sons who visits her in the hospital.
The substitution of one for I, a typically British use, is usually regarded as an affectation in the United States. See also he1, they.

-one

a suffix used in the names of ketones and analogous chemical compounds: lactone; quinone.

Origin of -one

perhaps < Greek -ōnē feminine patronymic

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for one


British Dictionary definitions for one

one

/ (wʌn) /

determiner

pronoun

noun

Related formsRelated prefixes: mono-, uni-Related adjective: single

Word Origin for one

Old English ān, related to Old French ān, ēn, Old High German ein, Old Norse einn, Latin unus, Greek oinē ace

-one

suffix forming nouns

indicating that a chemical compound is a ketoneacetone

Word Origin for -one

arbitrarily from Greek -ōnē, feminine patronymic suffix, but perhaps influenced by -one in ozone

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

Word Origin and History for one
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for one

-one

suff.

A ketone:acetone.
A compound that contains oxygen, especially in a carbonyl radical:lactone.

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

Science definitions for one

-one

A suffix used to form the names of chemical compounds containing an oxygen atom attached to a carbon atom, such as acetone.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with one

one

In addition to the idioms beginning with one

  • one and all
  • one and only
  • one and the same
  • one another
  • one by one
  • one eye on
  • one fell swoop, in
  • one foot in the grave, have
  • one for the books
  • one for the road
  • one good turn deserves another
  • one in a million
  • one jump ahead
  • one man's meat is another man's poison
  • one of a kind
  • one of these days
  • one of those days
  • one on one
  • one on, that's
  • one picture is worth a thousand words
  • one up
  • one way or another

also see:

  • all in one piece
  • all the same (one)
  • A-1 (A-one)
  • as one
  • at one
  • at one stroke
  • at one time
  • at one time or another
  • back to the drawing board (square one)
  • each and every (last one)
  • each other (one another)
  • fast one
  • for one, 1
  • go one better
  • hang (one) on
  • harp on (one string)
  • hole in one
  • in one ear and out the other
  • in the same (in one) breath
  • irons in the fire, more than one
  • it takes one to know one
  • just one of those things
  • look out for (number one)
  • more than one way to skin a cat
  • not one iota
  • number one
  • on the one hand
  • (one) picture is worth a thousand words
  • put all one's eggs in one basket
  • quick one
  • seen one, seen them all
  • six of one, half dozen of the other
  • that's one on me
  • tie one on
  • wear another (more than one) hat
  • with one arm tied behind one's back
  • with one voice
  • words of one syllable

(Note that this listing does not include those idioms where one is a personal pronoun meaning “someone” or “oneself.”)

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.