reflex: meaning, definition, pronunciation and examples
B2Neutral to formal; common in academic, medical, and technical contexts.
Quick answer
What does “reflex” mean?
An automatic, involuntary response to a stimulus.
Audio
Pronunciation
Definition
Meaning and Definition
An automatic, involuntary response to a stimulus.
Something that is a direct result of or reaction to something else; a reflection or manifestation of a deeper condition or cause.
Dialectal Variation
British vs American Usage
Differences
No significant differences in core meaning or usage. Spelling is identical.
Connotations
Identical connotations in both varieties.
Frequency
Slightly more frequent in American English in sports/athletic contexts (e.g., 'quick reflexes').
Grammar
How to Use “reflex” in a Sentence
have + a/the + reflexshow + a + reflextrigger + a + reflexbe + a + reflex + ofVocabulary
Collocations
Examples
Examples of “reflex” in a Sentence
adjective
British English
- reflex action
- reflex response
- reflex camera
American English
- reflex action
- reflex response
- reflex hammer
Usage
Meaning in Context
Business
Used metaphorically: 'The market's negative reflex was to sell all tech stocks.'
Academic
Common in psychology, neuroscience, and biology: 'The study examined the pupillary light reflex.'
Everyday
Often related to physical reactions or quick thinking: 'My reflex was to catch the falling glass.'
Technical
Precise term in medicine and physiology: 'The doctor checked the patient's deep tendon reflexes.'
Vocabulary
Synonyms of “reflex”
Vocabulary
Antonyms of “reflex”
Watch out
Common Mistakes When Using “reflex”
- Using 'reflex' to mean a thoughtful decision (e.g., 'After careful reflex, I decided...' is wrong).
- Misspelling as 'reflecs' or 'reflecx'.
- Using it as a verb (e.g., 'He reflexed quickly' is non-standard).
FAQ
Frequently Asked Questions
Primarily a noun. While 'reflex' can be used as an adjective (e.g., reflex action), it is very rarely used as a verb in modern English.
A reflex is a specific type of reaction that is immediate, involuntary, and often mediated by the spinal cord or lower brain (e.g., pulling your hand from heat). A 'reaction' is a broader term that can be slower and involve conscious thought.
Yes, especially when describing desirable automatic skills. For example, 'The goalkeeper's excellent reflexes won the match.'
A learned automatic response established by repeatedly pairing a neutral stimulus with one that naturally triggers a reflex. The famous example is Pavlov's dogs salivating at the sound of a bell.
An automatic, involuntary response to a stimulus.
Reflex is usually neutral to formal; common in academic, medical, and technical contexts. in register.
Reflex: in British English it is pronounced /ˈriːfleks/, and in American English it is pronounced /ˈriːfleks/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “knee-jerk reaction (often used synonymously with 'knee-jerk reflex')”
Learning
Memory Aids
Mnemonic
Think of a REFLEX like a mirror's REFLECTION — it's an immediate, automatic bounce-back to a stimulus.
Conceptual Metaphor
THE MIND/BODY IS A MACHINE WITH AUTOMATIC CIRCUITS.
Practice
Quiz
In which context is the word 'reflex' LEAST appropriate?