oh

1. Expression of surprise.

   Oh! I didn't see you there.

2. Expression of wonder, amazement, or awe.

   Oh, wow! That's amazing.

3. Expression of understanding, affirmation, recognition, or realization.

   Oh, so that's how it works.

4. A word to precede an annoyed remark.

   Oh, leave me alone.

5. A word to precede an added or offhand comment or afterthought.

   Oh, and don't forget your coat.

   1 more example

   What if he says, "Oh, I need to see your ID"?

6. An invocation or address (similar to the vocative in languages with noun declension), often with a term of endearment.

   Oh, gosh.

   1 more example

   Oh baby, baby, how was I supposed to know / That something wasn't right here?

   1998, Max Martin, ...Baby One More Time (song performed by Britney Spears)

7. oftenpoeticExclamation for drama or emphasis.

   Oh, when will it end?

   2 more examples

   Oh by what plots, by what forſwearings, betrayings, oppreſsions, impriſonments, tortures, poyſonings, and vnder what reaſons of State, and politique ſubteltie, haue theſe forenamed Kings, […] pulled the vengeance of GOD vpon them-ſelues, […]

   1614, Walter Ralegh [i.e., Walter Raleigh], “The Preface”, in The Historie of the World […], London: […] William Stansby for Walter Burre, […], →OCLC

   And oh how stingingly acute, and pungently grievous and tormentive, are the remembrancing Reflections of a separate uncloathed Soul in the other World, upon a review of its mad Choice, foolish Hopes, fruitless Desires […]

   1703, Lawrence Smith, The Evidence of Things Not Seen, page 143

8. Expression of pain. See ouch.

   Oh! That hurt.

   1 more example

   "'Oh! Oh!——I can't bear it————It is too much.——I die.—————I am going——" were Pollys expreſſions of extaſy: […]

   Fanny Hill

   1749, [John Cleland], “[Letter the First]”, in Memoirs of a Woman of Pleasure [Fanny Hill], volume I, London: […] [Thomas Parker] for G. Fenton [i.e., Fenton and Ralph Griffiths] […], →OCLC, page 83

9. Space filler or extra syllable, especially in (popular) music.

   I'm off with the raggle-taggle gypsy-oh.

   1968, MacKinlay Kantor, Beauty Beast

10. interrogativeExpression of mild scepticism.

    "You should watch where you're going!" "Oh?"

plural ohs

1. An utterance of oh; a spoken expression of surprise, acknowledgement, etc.

   There were ohs and ahs, and the people twisted about as they looked for her. Then they began to applaud.

   2011, Seabert Parsons, The Lost Codex of Palenque, page 240

present singular third person ohs · participle present ohing · participle past ohed · past ohed

1. intransitiveTo utter the interjection oh; to express surprise, etc.

   A quarter of an hour elapsed, and then, after several rings at the door-bell, a smothered laugh, and a good deal of ohing and ahing, the door was thrown open, and one by one, as they were announced, in came the expected characters.

   1852, Merry's museum and Parley's magazine, volumes 23-24, page 46

plural ohs · alternative common o

1. The name of the Latin script letter O/o.

   One genuine recycled local glass of aitch-two-oh

   2006, Ben Bova, Titan, page 33

   1 more example

   Exes and Ohs: A Downtown Girl's (Mostly Awkward) Tales of Love, Lust, Revenge, and a Little Facebook Stalking

   2011, Shallon Lester, (Please provide the book title or journal name)

plural ohs

1. The digit 0 (especially in representations of speech)

   "Oh-dark-thirty," the first soldier muttered without looking at his watch.

   2015, John Renehan, The Valley: A Novel, Penguin Publishing Group, →ISBN

   1 more example

   Jenny I've got your number. I need to make you mine. Jenny don't change your number. Eight six seven five three oh nine. Eight six seven five three oh nine. Eight six seven five three oh nine. Eight six seven five three oh nine. Tommy Tutone, "867-5309/Jenny"

   2010, Sal Mangano, “Chapter 1: Numerics”, in Mathematica Cookbook, O'Reilly Media, →ISBN, page 1

1. abbreviationAbbreviation of Ohio: a state of the United States.

plural OHs

1. InternetabbreviationinitialismInitialism of other half: a husband, wife, partner, etc.
2. USabbreviationinitialismaeronauticsInitialism of observation helicopter.
3. InternetabbreviationinitialismInitialism of overheard; a post whose contents were overheard by its author.

   OH: "We should just burn the whole place down"

1. abbreviationinitialismpluralplural onlyInitialism of office hours.

1. chemistryA hydroxyl, or alcohol, functional group.
2. chemistryA hydroxide radical, or hydroxyl group.

1. A surname from Korean derived from a common Korean surname.

   “Your son’s name. What is it?” “Oh. Benjamin Oh.” “Benjamin O … what?” “No, Oh, Officer. That’s it. The last name is Oh.”

   2021, Ruth Ozeki, The Book of Form and Emptiness, Canongate Books (2022), page 294

1. A surname from Chinese.