depth
B1Neutral to formal
Definition
Meaning
The distance from the top or surface to the bottom of something; the quality of being deep.
Intensity, complexity, or profundity of thought, feeling, or situation; the most intense or extreme part of something.
Linguistics
Semantic Notes
Primarily a noun; can refer to physical measurement, emotional intensity, intellectual complexity, or the most extreme part of a period or condition.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Minor spelling variations in related words (e.g., 'deepen' is same).
Connotations
Identical in both varieties.
Frequency
Equally common in both UK and US English.
Vocabulary
Collocations
Grammar
Valency Patterns
to a depth of [measurement]in depththe depth of [emotion/knowledge/winter]out of one's depthVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “out of one's depth”
- “in the depth(s) of winter”
- “plumb the depths”
- “depth of despair”
Usage
Context Usage
Business
Refers to detailed analysis ('in-depth report'), market penetration, or product range.
Academic
Used for intellectual rigor, detailed study, or conceptual complexity.
Everyday
Common for describing physical measurements, emotions, or thorough understanding.
Technical
Specific measurements in geography, photography (depth of field), computing (data depth), or oceanography.
Examples
By Part of Speech
verb
British English
- The submarine will depth-charge the wreck.
American English
- The software can depth-map the ocean floor.
adjective
British English
- The depth charge exploded underwater.
American English
- They conducted a depth psychology study.
Examples
By CEFR Level
- The pool has a depth of two metres.
- I don't know the depth of the lake.
- The depth of her knowledge surprised everyone.
- We need to study this topic in more depth.
- The film lacked emotional depth despite its exciting plot.
- The depth of the crisis became apparent only later.
- His analysis plumbed the depths of the philosophical dilemma.
- The research was praised for its intellectual depth and rigour.
Learning
Memory Aids
Mnemonic
Think of 'DEPTH' as 'DEEP' with a 'TH' at the end – it measures how DEEP something is.
Conceptual Metaphor
KNOWLEDGE/UNDERSTANDING IS DEPTH (e.g., 'deep thinking', 'shallow analysis'). EMOTION IS DEPTH (e.g., 'depth of feeling').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing with 'глубина' (which is correct) and 'толщина' (thickness). 'Depth of winter' translates idiomatically as 'разгар зимы', not literal 'глубина зимы'.
Common Mistakes
- Using 'deepness' instead of 'depth' in formal contexts. Incorrect preposition: 'in a depth' instead of 'at a depth' or 'to a depth'.
Practice
Quiz
Which phrase means 'to be involved in something too difficult'?
FAQ
Frequently Asked Questions
Usually uncountable when referring to the concept. Can be countable in technical contexts (e.g., 'different depths').
'Depth' is the standard noun. 'Deepness' is rare and usually poetic or archaic.
It's an adverbial phrase meaning 'thoroughly' (e.g., 'study in depth'). Often hyphenated as adjective ('in-depth analysis').
Yes, metaphorically (e.g., 'the depth of winter' means the coldest, darkest part).
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