coherence
C1Formal/Academic/Technical
Definition
Meaning
The logical, orderly, and consistent connection or relationship between ideas, parts, or elements, forming a unified whole.
In physics and optics, a property of waves (light, sound) where they maintain a constant phase relationship; more generally, the quality of being internally consistent, rational, and understandable.
Linguistics
Semantic Notes
Primarily an abstract quality noun. Its evaluative nature makes it often collocate with verbs like 'lack', 'achieve', 'maintain', 'improve'. Its opposite, 'incoherence', is equally common.
Dialectal Variation
British vs American Usage
Differences
Meaning and usage are identical. Minor preference for 'coherence' in UK academic writing over 'clarity', while US usage may slightly favour 'consistency' in some business contexts.
Connotations
Universally positive connotation of logic, order, and intelligibility. In UK academic critique, 'lacks coherence' is a standard, serious criticism.
Frequency
Slightly higher frequency in UK academic corpora; equally common in US technical and scientific writing.
Vocabulary
Collocations
Grammar
Valency Patterns
The [essay/document] lacks coherence.To achieve coherence between [X] and [Y].The [policy/argument] has a certain internal coherence.There is a need for greater coherence in [the plan/the system].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A thread of coherence”
- “To hang together (as a synonym for being coherent)”
Usage
Context Usage
Business
Used in strategy discussions, e.g., 'We need coherence between our marketing and sales objectives.'
Academic
A key criterion for evaluating essays, theses, and theories, e.g., 'The study's main weakness is a lack of theoretical coherence.'
Everyday
Less common, but used to describe confusing stories, plans, or explanations, e.g., 'His explanation had no coherence.'
Technical
Crucial in optics/physics (laser coherence), signal processing, and linguistics (discourse coherence).
Examples
By Part of Speech
verb
British English
- The various departments failed to cohere into a single strategy.
- The plot strands never really cohered.
American English
- The team needs to cohere before the playoffs.
- His ideas didn't cohere into a practical plan.
adverb
British English
- He argued coherently and persuasively.
- The report is coherently structured.
American English
- She laid out her case coherently.
- The system is designed to work coherently.
adjective
British English
- She gave a coherent account of the event.
- A coherent policy framework is essential.
American English
- He was barely coherent after the shock.
- The proposal is not financially coherent.
Examples
By CEFR Level
- The story was good but lacked coherence in the middle.
- For your essay, check the coherence between your paragraphs.
- The government's new policy lacks coherence with its environmental commitments.
- The coherence of his argument was undermined by several factual errors.
- The philosophical treatise was praised for its remarkable internal coherence and rigour.
- Quantum coherence is a fragile state essential for new computing technologies.
Learning
Memory Aids
Mnemonic
Think: 'Co-here-ence' – things 'sticking together' logically. A coherent story 'holds together' well.
Conceptual Metaphor
COHERENCE IS A BOND/GLUE (that holds ideas together); COHERENCE IS A THREAD (running through an argument).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid directly translating from Russian 'связность' in all contexts, as it can be narrower. 'Coherence' is more about logical connection than just sequential linking ('последовательность'). 'Согласованность' (coordination) is also a partial, but not perfect, match.
Common Mistakes
- Confusing with 'cohesion' (which is about sticking together physically or socially, while coherence is about logical sense). Misspelling as 'coherance'. Using it as a countable noun (e.g., 'a coherence' is rare).
Practice
Quiz
In which context is 'coherence' used in its most technical sense?
FAQ
Frequently Asked Questions
Coherence is about logical sense and clarity (ideas connecting in the mind). Cohesion is about physical or grammatical sticking together (e.g., using linking words, a group staying united). A text can be cohesive but not coherent.
It's the direct antonym, but 'inconsistency', 'disjointedness', 'confusion', and 'illogicality' are close depending on context.
Yes, but usually via the adjective 'coherent' (e.g., 'He wasn't coherent' meaning his speech was muddled). The noun 'coherence' is rarely applied directly to a person.
It is common in academic, technical, and formal writing (C1 level). It is less frequent in everyday casual conversation, where people might say 'it doesn't make sense' or 'it's all over the place' instead.
Collections
Part of a collection
Advanced Communication
C1 · 47 words · Sophisticated language for professional communication.
Critical Thinking
C1 · 49 words · Vocabulary for structured logical reasoning and analysis.
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