fidelity
C1Formal, Academic, Technical
Definition
Meaning
Faithfulness or loyalty to a person, principle, or cause; strict observance of promises, duties, or obligations.
The degree of exactness with which something is copied, reproduced, or translated from an original; also used in electronics/audio to describe accurate sound reproduction.
Linguistics
Semantic Notes
The word is often used in binary pairs (fidelity vs. infidelity, high fidelity vs. low fidelity). In relationships, it implies sexual exclusivity. In technical contexts, it implies precision and accuracy.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling is identical.
Connotations
Equally strong formal and moral connotations in both varieties. Slightly more common in US English in the technical sense ('hi-fi').
Frequency
Similar frequency in both varieties, perhaps marginally higher in American English due to the common abbreviation 'hi-fi'.
Vocabulary
Collocations
Grammar
Valency Patterns
fidelity to [person/principle/cause]fidelity of [reproduction/translation]with fidelityVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Fidelity bond (insurance)”
- “Hi-fi (high fidelity audio equipment)”
- “Pledge fidelity”
Usage
Context Usage
Business
In contracts and insurance (e.g., 'fidelity bond' to protect against employee theft).
Academic
In literary criticism (fidelity to the source text), history (political fidelity), and ethics.
Everyday
Primarily in discussions of marriage and relationships.
Technical
In audio engineering (high-fidelity sound), telecommunications (signal fidelity), and data science (model fidelity).
Examples
By Part of Speech
verb
British English
- To fidelity (verb) is not a standard form. Use 'remain faithful' or 'be loyal'.
American English
- To fidelity (verb) is not a standard form. Use 'maintain fidelity' or 'show fidelity'.
adverb
British English
- The document was translated fidelity (rare; 'faithfully' is standard).
- He reproduced the sound fidelity (incorrect; use 'with high fidelity').
American English
- She served the company fidelity (rare/archaic; 'faithfully' is standard).
- The model represents the data fidelity (incorrect; use 'with fidelity').
adjective
British English
- A high-fidelity recording
- A fidelity bond
American English
- A hi-fi system
- A fidelity insurance policy
Examples
By CEFR Level
- Dogs are known for their fidelity to their owners.
- The film was criticised for its lack of fidelity to the original book.
- He promised fidelity to his wife.
- The translator's primary concern was maintaining absolute fidelity to the author's style and intent.
- Marital fidelity is a cornerstone of their relationship.
- The audio system boasted exceptional fidelity, reproducing the concert hall's acoustics with astonishing precision.
- His political fidelity to the party line never wavered, even during the scandal.
Learning
Memory Aids
Mnemonic
Think of a FIDELity card from a store – it shows your LOYALTY to that shop. Or: A faithful dog is the picture of FIDELity.
Conceptual Metaphor
FIDELITY IS A BOND/TIE (e.g., 'bonds of fidelity'), FIDELITY IS PRECISION (e.g., 'reproduced with perfect fidelity').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Не путать с 'фиделити' как маркетинговой программой (лояльность).
- В техническом контексте — 'точность', 'адекватность', а не просто 'верность'.
- В контексте отношений — уже подразумевает сексуальную верность, не требует уточнения.
Common Mistakes
- Using 'fidelity' for general truthfulness instead of loyalty/accuracy (e.g., 'He spoke with fidelity' is odd).
- Misspelling as 'fidelaty' or 'fidality'.
- Confusing 'infidelity' (breaking marital faith) with general dishonesty.
Practice
Quiz
In which context is 'fidelity' LEAST likely to be used?
FAQ
Frequently Asked Questions
No. While a very common use is 'marital fidelity', it broadly means loyalty in any context (e.g., to a friend, country, or ideal) and precision in technical contexts (e.g., 'high-fidelity sound').
'Fidelity' is often stronger and more formal, suggesting unwavering, devoted faithfulness, often with a moral dimension. 'Loyalty' can be more general and is used in broader contexts (brand loyalty, loyalty to a sports team). 'Fidelity' is the preferred term for marital/sexual faithfulness and technical accuracy.
Not directly. The adjective form is 'faithful' or 'loyal'. However, 'high-fidelity' (or 'hi-fi') is a compound adjective used in technical contexts.
It is a form of insurance that protects a business from financial losses caused by fraudulent or dishonest acts (e.g., theft, embezzlement) committed by its employees.