Definitions for o-

This page provides all possible meanings and translations of the word o-

Random House Webster's College Dictionary

O, o(n.)(pl.)O's; Os, o's; os; oes.

  1. the 15th letter of the English alphabet, a vowel.

  2. any spoken sound represented by this letter.

  3. something shaped like anO.

  4. a written or printed representation of the letter O or


O(interj.; n.)(pl.)O's.

  1. (interj.)(used before a name in direct address, esp. in solemn or poetic language, to lend earnestness to an appeal):

    Hear, O Israel!

  2. (used as an expression of surprise, pain, annoyance, longing, gladness, etc.)

  3. (n.)the exclamation “O.”

Origin of O:

1125–75; ME < OF < L ō


  1. Old.

  2. Gram. object.

    Category: Grammar


  1. the 15th in order or in a series.

  2. the Arabic numeral; zero; cipher.

  3. a major blood group.

    Category: Physiology

    Ref: Compare ABO system.

  4. oxygen.

    Category: Chemistry

* Symbol..


  1. of:

    o'clock; will-o'-the-wisp.

  2. Chiefly Dial. on.

Origin of o':

ME; by shortening.


  1. a prefix meaning “descendant,” in Irish family names:

    O'Brien; O'Connor.

    Category: Affix

Origin of O':

repr. Ir ó descendant, OIr au


  1. ortho-.

    Category: Chemistry, Affix


  1. var. of ob- before

    m: omission.

    Category: Affix


  1. var. of oo- :


    Category: Affix


  1. the typical ending of the first element of compounds of Greek origin, used regularly in forming new compounds with elements of Greek origin and often used in English as a connective irrespective of etymology: Franco-Italian; geography; seriocomic; speedometer.

    Category: Affix

    Ref: Compare -i-. 8

Origin of -o-:

ME (< OF) < L < Gk


  1. a suffix occurring as the final element in informal shortenings of nouns (ammo; combo; promo); -o also forms nouns, usu. derogatory, for persons or things exemplifying or associated with that specified by the base noun or adjective (pinko; weirdo; wino).

    Category: Affix

  2. a suffix occurring in informal noun or adjective derivatives, usu. grammatically isolated, as in address:

    kiddo; neato; righto.

    Category: Affix


  1. pint.

    Category: Weights and Measures

  2. October.

  3. Ohio.

Origin of O.:

< L octārius


  1. ocean.

  2. pint.

    Category: Weights and Measures

  3. octavo.

  4. off.

  5. old.

  6. only.

  7. order.

  8. out.

    Category: Sport

Origin of o.:

< L octārius


  1. o-(Noun)

    A blood type that has no antigens. It lacks the A, B and Rh factors on the blood cells. It is the universal donor for blood and can give blood to any blood type, but can only receive O- blood.

Translations for o-

Kernerman English Multilingual Dictionary


(of legs) bent outwards at the knee

She wears long skirts to hide her bandy legs.

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