occur
B2Formal to neutral
Definition
Meaning
To happen, take place, or come to mind.
To be found or present in a particular place or situation.
Linguistics
Semantic Notes
Often used for unplanned or natural events. Can imply a mental event (idea occurring to someone).
Dialectal Variation
British vs American Usage
Differences
Spelling differences apply in derived forms: BrE 'occurred', 'occurring', 'occurrence'; AmE follows the same pattern. Usage is largely identical.
Connotations
Slightly more formal than 'happen' in both varieties.
Frequency
Equally frequent in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
It occurs that...Something occurs to somebodySomething occurs in/on/at...A problem/error/change occursVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “It occurs to me that...”
- “if the opportunity occurs”
Usage
Context Usage
Business
Used to describe events, problems, or changes in processes: 'A significant error occurred during the data transfer.'
Academic
Frequently used in scientific writing to describe phenomena: 'The reaction occurs at room temperature.'
Everyday
For describing events: 'When did the accident occur?'
Technical
Common in computing/logistics: 'A fault occurs when the system overheats.'
Examples
By Part of Speech
verb
British English
- Such extreme weather events occur more frequently now.
- It didn't occur to him to check the schedule.
American English
- The meeting will occur next Tuesday.
- Did it occur to you to call first?
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- The party will occur on Saturday.
- Birds occur in many colours.
- Accidents can occur if you're not careful.
- A great idea occurred to me yesterday.
- The phenomenon is known to occur in tropical climates.
- It suddenly occurred to her that she had left the oven on.
- Mutations occur spontaneously in the genome.
- It never occurred to the board to question the ethical implications.
Learning
Memory Aids
Mnemonic
Think: 'An Occurrence is a CURious event that happens.' The 'cur' sound links to 'curious'.
Conceptual Metaphor
EVENTS ARE MOVING OBJECTS (The idea occurred to me).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation of 'occur' as 'происходить' for mental events ('It occurs to me' = 'Мне пришло в голову', not 'Мне происходит').
- Do not overuse 'occur' in place of simpler 'happen'.
Common Mistakes
- Incorrect spelling: 'occured', 'ocurred'.
- Wrong preposition: 'occur at me' instead of 'occur to me'.
- Overuse in informal speech where 'happen' is more natural.
Practice
Quiz
Which sentence uses 'occur' correctly?
FAQ
Frequently Asked Questions
'Occur' is slightly more formal and is preferred in scientific or technical contexts. 'Happen' is more common in everyday speech.
The past tense is 'occurred' (double 'r'). The same rule applies to 'occurring' and 'occurrence'.
Yes, in the pattern 'It occurs to somebody that...' or 'An idea occurs to somebody.'
No, 'occur' is intransitive. It does not take a direct object.