prefix, prep ·Uncommon ·Advanced level

Definitions

Preposition

1. 1
   Contraction of of, usually before consonants. abbreviation, alt-of, contraction, unstressed

   "Gimme two o’ those ones."

2. 2
   Contraction of on. abbreviation, alt-of, archaic, contraction, unstressed

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

Prefix

1. 1
   descendant of; used to form Irish patronymic surnames. morpheme

   "O'Reilly"

Synonyms

All synonyms

-a-

Example

More examples

"from two o’clock until closing time"

Etymology

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

Related phrases

Besses o' th' BarnBrig o' TurkCambus o' MayIrlams o' th' HeightJack o' the clockJohn O'GauntJohn o’ GroatsLand o' CakesPeep o' Day BoyRun-O-WatersTom o' Bedlamback o’ Bourke

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.