ONE, a. wun. [L. unus; Gr.]

1. Single in number; individual; as, one man; one book. There is one sun only in our system of planets.
2. Indefinitely, some or any. You will one day repent of your folly. But in this phrase, one day is equivalent to some future time.
3. It follows any. When any one heareth the word of the kingdom. – Matth. xiii.
4. Different; diverse; opposed to another. It is one thing to promise, and another to fulfill.
5. It is used with another, to denote mutuality or reciprocation. Be kind and assist one another.
6. It is used with another, to denote average or mean proportion. The coins one with another, weigh seven penny weight each.
7. One of two; opposed to other. Ask from one side of heaven to the other. – Deut. iv.
8. Single by union; undivided; the same. The church is therefore one, though the members may be many. – Pearson.
9. Single in kind; the same. One plague was on you and on all your lords. – 1 Sam. iv. One day, on a certain or particular day, referring to time past. One day when Phoebe fair / With all her band was following the chase. – Spenser. #2. Referring to future time; at a future time, indefinitely. [See One, No. 2.] At one, in union; in agreement or concord. The king resolved to keep Ferdinand and Phillip at one with themselves. – Bacon. In one, in union; in one united body. One, like many other adjectives, is used without a noun, and is to be considered as a substitute for some noun understood. Let the men depart one by one; count them one by one; every one has his peculiar habits; we learn of one another, that is, we learn, one of us learns of another. In this use, as a substitute, one may be plural; as the great ones of the earth; they came with their little ones. It is also denotes union, a united body. Ye are all one in Christ Jesus. Gal. iii. One o'clock, one hour of the clock, that is, as signified or represented by the clock. One is used indefinitely for any person; as, one sees; one knows; after the French manner, on voit. Our ancestors used man in this manner; man sees; man knows; “man brohte,” man brought, that is, they brought. Saxon. This word we have received from the Latin through the Italian and French. The same word from our Saxon ancestors we write an.

1. A suffix indicating that the substance, in the name of which it appears, is a ketone; as, acetone.
2. A termination indicating that the hydrocarbon to the name of which it is affixed belongs to the fourth series of hydrocarbons, or the third series of unsaturated hydrocarbonsl as, nonone.
3. Being a single unit, or entire being or thing, and no more; not multifold; single; individual.
   
   

   The dream of Pharaoh is one. Gen. xli. 25.

   O that we now had here
   But one ten thousand of those men in England. Shak.

4. A single unit; as, one is the base of all numbers.
5. To cause to become one; to gather into a single whole; to unite; to assimilite.
   
   
   [Obs.]

   The rich folk that embraced and oned all their heart to treasure of the world. Chaucer.

6. Any person, indefinitely; a person or body; as, what one would have well done, one should do one's self.
   
   

   It was well worth one's while. Hawthorne.

   Against this sort of condemnation one must steel one's self as one best can. G. Eliot.

   One is often used with some, any, no, each, every, such, a, many a, another, the other, etc. It is sometimes joined with another, to denote a reciprocal relation.

   When any one heareth the word. Matt. xiii. 19.

   She knew every one who was any one in the land of Bohemia. Compton Reade.

   The Peloponnesians and the Athenians fought against one another. Jowett (Thucyd. ).

   The gentry received one another. Thackeray.

7. Denoting a person or thing conceived or spoken of indefinitely; a certain. "I am the sister of one Claudio" [Shak.], that is, of a certain man named Claudio.
8. A symbol representing a unit, as 1, or i.
9. Pointing out a contrast, or denoting a particular thing or person different from some other specified; -- used as a correlative adjective, with or without the.
   
   

   From the one side of heaven unto the other. Deut. iv. 32.

10. A single person or thing.
    
    
    "The shining ones." Bunyan. "Hence, with your little ones." Shak.

    He will hate the one, and love the other. Matt. vi. 24.

    That we may sit, one on thy right hand, and the other on thy left hand, in thy glory. Mark x. 37.

    After one, after one fashion; alike. [Obs.] Chaucer. -- At one, in agreement or concord. See At one, in the Vocab. -- Ever in one, continually; perpetually; always. [Obs.] Chaucer. -- In one, in union; in a single whole. -- One and one, One by one, singly; one at a time; one after another. "Raising one by one the suppliant crew." Dryden.

11. Closely bound together; undivided; united; constituting a whole.
    
    

    The church is therefore one, though the members may be many. Bp. Pearson

12. Single in kind; the same; a common.
    
    

    One plague was on you all, and on your lords. 1 Sam. vi. 4.

13. Single; inmarried.
    
    
    [Obs.]

    Men may counsel a woman to be one. Chaucer.

    * One is often used in forming compound words, the meaning of which is obvious; as, one-armed, one-celled, one-eyed, one-handed, one-hearted, one- horned, one-idead, one-leaved, one-masted, one-ribbed, one-story, one-syllable, one- stringed, one-winged, etc.

    All one, of the same or equal nature, or consequence; as, he says that it is all one what course you take. Shak. -- One day. (a) On a certain day, not definitely specified, referring to time past.

    One day when Phoebe fair,
    With all her band, was following the chase. Spenser.

    (b) Referring to future time: At some uncertain day or period; some day.

    Well, I will marry one day. Shak.