detect
B2Formal to neutral; common in technical, scientific, medical, and security contexts
Definition
Meaning
to discover or notice the presence of something, especially something that is not easy to see, hear, or notice
to identify or determine the existence, presence, or fact of something through observation, investigation, or technology; to perceive something subtle or hidden
Linguistics
Semantic Notes
Often implies the use of instruments, careful observation, or special methods to find something that is not obvious. Carries a nuance of uncovering something hidden, subtle, or previously unknown.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and grammar are identical.
Connotations
Identical connotations in both varieties.
Frequency
Equally common and used in the same contexts in both BrE and AmE.
Vocabulary
Collocations
Grammar
Valency Patterns
detect + NP (object)detect + that-clausedetect + NP + V-ingbe detected + in/on/byVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “detect a note of (e.g., sarcasm)”
- “nothing to detect”
Usage
Context Usage
Business
Used in compliance and security: 'The software detects fraudulent transactions.'
Academic
Common in scientific writing: 'The study detected significant levels of pollution.'
Everyday
General observation: 'I detected a hint of cinnamon in the cake.'
Technical
Precise measurement/identification: 'Sensors detect minute changes in pressure.'
Examples
By Part of Speech
verb
British English
- The new scanner can detect tumours at a very early stage.
- Can you detect any trace of gas in the room?
American English
- The system detected an intruder on the property.
- Tests failed to detect the virus in his blood.
adverb
British English
- The substance is detectably present in the water supply.
- His accent is detectably Scottish.
American English
- The temperature changed detectably overnight.
- Her anxiety was detectably high.
adjective
British English
- The detectable signal was very weak.
- There was no detectable difference between the samples.
American English
- The amount of lead was barely detectable.
- A detectable change in his mood occurred.
Examples
By CEFR Level
- Dogs can detect many smells.
- I can detect sugar in this drink.
- The test can detect the disease early.
- She detected a mistake in the report.
- Scientists have detected water on the planet.
- He detected a note of insincerity in her apology.
- Advanced algorithms are used to detect subtle patterns in financial data.
- The study detected a statistically significant correlation between the two variables.
Learning
Memory Aids
Mnemonic
Think of a DETECTive finding clues. A DETECTive DETECTs evidence.
Conceptual Metaphor
KNOWING IS SEEING (to detect is to make the invisible visible).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating directly as 'детектировать' in non-technical contexts; use 'обнаруживать', 'замечать'.
- Do not confuse with 'расследовать' (to investigate). 'Detect' is about finding, not the process of searching.
Common Mistakes
- Incorrect: 'I detected to see a mistake.' Correct: 'I detected a mistake.'
- Overuse in simple contexts where 'see', 'notice', or 'find' is more natural.
Practice
Quiz
In which context is the word 'detect' LEAST appropriate?
FAQ
Frequently Asked Questions
No. While common in technical contexts, it is also used in everyday language to mean 'notice something subtle' (e.g., 'I detected sadness in his voice').
The main noun forms are 'detection' (the act or process) and 'detector' (a device that detects something).
Yes, it can be used figuratively to mean perceiving a subtle emotion, tone, or quality (e.g., 'detect hostility', 'detect enthusiasm').
'Discover' often implies finding something new or unknown for the first time. 'Detect' emphasizes using senses or tools to notice something existing but hidden, subtle, or not obvious.