o'

/ə/US, stressed/oʊ/

prefix

Descendant of; used to form Irish patronymic surnames.

“O'Reilly”

OriginIrish Ó →
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Meanings

o'1

preposition

alternative o · alternative a

  1. abbreviationcontractionunstressedContraction of of, usually before consonants.

    top o’ the mornin to ye

    2 more examples

    Gimme two o’ those ones.

    from two o’clock until closing time

  2. abbreviationarchaiccontractionunstressedContraction of on.

    A pox o' your throat, you bawling, blasphemous, incharitable dog!

    1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene i]

O'2

prefix
  1. Descendant of; used to form Irish patronymic surnames.

    O'Reilly

Synonyms & antonyms

Also see
-a-

Origin

  1. IrishÓ
  2. EnglishO'

From Irish Ó. Unrelated to English o' (“of”).

More words from Irish

Full word history & related roots →

Rhymes & wordplay

Rhymes with o'

todonosogoknowshowolowbelowcoproagothoughohalthoughflowpojoemosnowhellorowgrow
All rhymes →

Sounds the same

a
Cite this entry
APA

o'. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/o'

MLA

“o'.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/o'. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “o',” accessed November 4, 2026, https://dictionary.watkinsx.com/word/o'.

Source: o' on Wiktionary, CC BY-SA 4.0.