o.k.
A1 (Extremely High)Informal; used in all registers from casual to semi-formal (spelled 'okay'), but less common in highly formal writing.
Definition
Meaning
A term indicating agreement, approval, or acceptability; satisfactory.
Can denote something is functioning adequately, is ready to proceed, or is permissible. Also used as a placeholder term for agreement in conversation.
Linguistics
Semantic Notes
Highly versatile; functions as an adjective, adverb, interjection, noun (the OK), and verb (to okay/O.K. something). Its meaning is heavily context-dependent.
Dialectal Variation
British vs American Usage
Differences
Usage is nearly identical. All spellings (OK, O.K., okay) are used in both varieties. The spelling 'okay' is perhaps slightly more common in formal British contexts.
Connotations
The same core connotations of assent or adequacy. In American English, 'OK' is famously associated with the 'OK Hand Sign' (👌).
Frequency
Extremely high frequency in both varieties; a core, indispensable word in daily speech.
Vocabulary
Collocations
Grammar
Valency Patterns
[It is] + OK + [to-infinitive][Subject] + is/are + OKOK + [as a response][Verb] + something + OKVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A-OK”
- “OK corral (pun/joke reference)”
- “give the OK/give the okay”
Usage
Context Usage
Business
Used to confirm understanding or approval in emails/meetings (e.g., 'Okay, let's proceed with the proposal').
Academic
Generally avoided in formal academic prose. May appear in quotes, informal notes, or seminar discussions.
Everyday
The primary domain: used constantly for agreement, checking well-being, and confirming plans.
Technical
Used in software/UI (OK buttons), aviation (Roger, but not 'OK'), and checklists to indicate status.
Examples
By Part of Speech
verb
British English
- The manager will need to okay the expenses.
- Has the plan been O.K.'d by head office?
American English
- The boss needs to OK the budget before we spend.
- They okayed the launch date.
adverb
British English
- The engine is running okay now.
- She did okay on her driving test.
American English
- I think the project is going OK.
- You handled that situation okay.
adjective
British English
- The food was okay, but not brilliant.
- Is it okay if I open the window?
American English
- His grades are okay, but he could do better.
- It's OK to park here after 6 PM.
Examples
By CEFR Level
- OK, I understand.
- Are you OK?
- The coffee is OK.
- It's OK to make mistakes when you're learning.
- The meeting went OK, but we didn't decide everything.
- OK, let's meet at 5 pm.
- The proposal seems okay, but it needs more financial detail.
- He managed to fix the computer, and it's working okay for now.
- I just need your okay to finalise the order.
- While the initial results are okay, they fall short of our ambitious targets.
- The committee grudgingly okayed the controversial expenditure.
- Her performance was more than just okay; it was subtly brilliant.
Learning
Memory Aids
Mnemonic
Imagine a big green button with 'OK' on it that you press to approve something. It's the universal symbol for 'yes' or 'good to go'.
Conceptual Metaphor
APPROVAL/AGREEMENT IS A GREEN LIGHT; SATISFACTORY IS ON THE PATH (not deviating).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with Russian 'хорошо' in every context. 'OK' is more about agreement/permission than quality. In 'I'm OK', it means 'I'm fine/alright', not 'I'm good' in a moral sense.
- Avoid overusing 'OK?' as a tag question (like 'да?') in English; it can sound impatient.
Common Mistakes
- Incorrect spelling variations like 'ok', 'Ok', 'o.k' (missing second dot). The standard forms are 'OK', 'O.K.', or 'okay'.
- Using it as a formal confirmation in legal documents (use 'approved' or 'agreed').
- Overusing 'OK?' as a tag question, making speech sound insecure.
Practice
Quiz
In which of the following contexts would 'OK' be LEAST appropriate?
FAQ
Frequently Asked Questions
All are correct. 'OK' and 'okay' are the most common modern forms. 'O.K.' is less frequent but still valid. 'Okay' is often preferred in more formal writing as it looks like a standard word.
The most widely accepted etymology is a humorous abbreviation of 'oll korrect', a deliberate misspelling of 'all correct' popular in Boston in the 1830s. It was further popularised in the 1840 US presidential election.
Use with caution. The spelled-out form 'okay' is sometimes acceptable in semi-formal contexts, but in highly formal academic or legal documents, words like 'acceptable', 'approved', 'satisfactory', or 'agreed' are better choices.
Yes, for all practical purposes. It is a core, indispensable word in both varieties with identical functions and near-identical frequency. Minor spelling preferences may exist, but comprehension is universal.
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