One Definition

wŭn
ones
adjective
Being a single entity, unit, object, or living being.
I ate one peach.
American Heritage
Characterized by unity; forming a whole; united; undivided.
With one accord.
Webster's New World
Being a single thing or unit; not two or more.
Webster's New World
Single in kind; the same.
All of one mind.
Webster's New World
Designating a person or thing as contrasted with or opposed to another or others.
From one day to another.
Webster's New World
Antonyms:
none
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noun
ones
The number expressing unity or designating a single unit: the lowest cardinal number and the first used in counting a series; 1; I.
Webster's New World
A single person or thing.
Webster's New World
Something numbered one or marked with one pip, as the face of a die or domino.
Webster's New World
A one-dollar bill.
Webster's New World

(mathematics) The neutral element with respect to multiplication in a ring.

Wiktionary
Antonyms:
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pronoun
An indefinitely specified individual.
She visited one of her cousins.
American Heritage
Some, or a certain, person or thing.
One of us must go.
Webster's New World
An unspecified individual; anyone.
American Heritage
Any person or thing; anybody or anything [when one is exhausted, it is wise to rest]
What else could one do?
Webster's New World
The person or thing previously mentioned.
They rent a house, but I own one.
Webster's New World
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suffix
A ketone.
Acetone.
American Heritage
A chemical compound containing oxygen, especially in a carbonyl group.
Lactone.
American Heritage
Wiktionary
affix
Ketone.
Acetone.
Webster's New World
Any of certain related compounds containing oxygen.
Lactone.
Webster's New World
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verb

(obsolete) To cause to become one; to gather into a single whole; to unite.

Wiktionary
anagram

Eon, EON, E.ON; Neo, NEO.

Wiktionary
other
A suffix used to form the names of chemical compounds containing an oxygen atom attached to a carbon atom, such as acetone.
American Heritage Science
idiom
at one
  • In accord or unity.
American Heritage
one and all
  • Everyone.
American Heritage
one by one
  • Individually in succession.
American Heritage
all one
  • making no difference; of no importance
Webster's New World
at one
  • of the same opinion; in accord
Webster's New World
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Other Word Forms of One

Noun

Singular:
one
Plural:
ones

Origin of One

  • From Middle English one, oon, on, oan, an, from Old English ān ("one"; same word as an), from Proto-Germanic *ainaz (“one"), from Proto-Indo-European *óynos (“single, one"). Cognate with Scots ae, ane, wan, yin (“one"); North Frisian Ã¥n (“one"); Saterland Frisian aan (“one"); West Frisian ien (“one"); Dutch een, één (“one"); German Low German een; German ein, eins (“one"); Swedish en (“one"); Icelandic einn (“one"); Latin unus (“one") (Old Latin oinos); Russian один (odin).

    From Wiktionary

  • Middle English on from Old English ān oi-no- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Probably from Greek -ōnē feminine patronymic suff

    From American Heritage Dictionary of the English Language, 5th Edition

  • arbitrary use of Gr -ōnē, used to signify a female descendant of

    From Webster's New World College Dictionary, 5th Edition

  • Probably Ancient Greek -όνη (-onÄ“)

    From Wiktionary

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