dual personality
Medium-LowFormal, sometimes clinical/historical, often used in figurative or journalistic contexts.
Definition
Meaning
A state where an individual exhibits two distinct, contrasting sets of behaviours, attitudes, or social personas.
In non-clinical usage, it refers to marked inconsistency in a person's character, where they appear to switch between two different 'selves', often in different contexts. Historically, it was an early term for what is now known as Dissociative Identity Disorder (DID).
Linguistics
Semantic Notes
The term is largely obsolete in professional psychiatry, having been replaced by more precise diagnostic labels (e.g., Dissociative Identity Disorder). Its modern use is primarily metaphorical or literary to describe contradictory behaviour.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. The term is equally understood and used in both varieties.
Connotations
In both, it carries a slightly dated or pop-psychology feel when used outside of historical medical discussion.
Frequency
Comparatively low frequency in both, with similar usage patterns.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] has/exhibits a dual personality.The dual personality of [entity/person] is evident in...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A Jekyll and Hyde personality”
Usage
Context Usage
Business
Rare. Could describe a company's conflicting public and private practices: 'The firm's dual personality—eco-friendly in ads, but polluting in practice—was exposed.'
Academic
Used in psychology history, literary analysis (e.g., Stevenson's 'Dr Jekyll and Mr Hyde'), or cultural studies discussing identity.
Everyday
Figurative: 'My boss has a dual personality—charming in meetings, a tyrant in the office.'
Technical
Largely obsolete in clinical psychology. Appears in historical texts on psychopathology.
Examples
By Part of Speech
verb
British English
- (Not standard; the term is nominal. One might 'manifest a dual personality'.)
American English
- (Not standard; the term is nominal. One might 'display a dual personality'.)
adverb
British English
- (Not applicable; no standard adverbial form.)
American English
- (Not applicable; no standard adverbial form.)
adjective
British English
- The dual-personality aspect of the character was fascinating.
- He showed dual-personality tendencies.
American English
- The dual-personality nature of the politician was scrutinized.
- Her dual-personality behavior was confusing.
Examples
By CEFR Level
- Sometimes he is very kind, sometimes very mean. It is like he has a dual personality.
- The film villain had a dual personality: a quiet librarian by day, a thief by night.
- The author's nuanced portrayal explores the protagonist's dual personality not as a disorder, but as a strategic adaptation to societal pressures.
Learning
Memory Aids
Mnemonic
Think of DUEL + PERSONALITY. Imagine two personas in a duel inside one person's mind.
Conceptual Metaphor
THE SELF IS A CONTAINER HOLDING MULTIPLE PERSONS.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'двойная личность' as primary translation; 'раздвоение личности' is the established equivalent, though also somewhat outdated. 'Двуличность' means hypocrisy, not a clinical condition.
Common Mistakes
- Using it as a synonym for 'mood swings' or 'bipolar disorder'. Confusing it with 'split mind' (schizophrenia).
Practice
Quiz
In modern figurative use, 'dual personality' most often describes:
FAQ
Frequently Asked Questions
No, it is largely historical. The current diagnostic term in the DSM-5 is Dissociative Identity Disorder (DID).
They are near-synonyms in popular usage, both being outdated. 'Split personality' is a more common lay term but is inaccurate and stigmatizing.
Yes, figuratively. It can describe an entity that presents two contradictory faces or sets of values (e.g., a company's public vs. internal culture).
Robert Louis Stevenson's 'Strange Case of Dr Jekyll and Mr Hyde' (1886) is the archetypal cultural reference for this concept.