coastal plain: meaning, definition, pronunciation and examples
C1Formal, Academic, Technical, Geographic
Quick answer
What does “coastal plain” mean?
A flat, low-lying area of land adjacent to a seacoast, often formed by sedimentary deposits and characterized by gentle slopes.
Audio
Pronunciation
Definition
Meaning and Definition
A flat, low-lying area of land adjacent to a seacoast, often formed by sedimentary deposits and characterized by gentle slopes.
Used more broadly to refer to coastal regions in general, especially in discussions of climate, agriculture, or human settlement. In geopolitics, it can denote a specific geographical zone of strategic or economic importance.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. Minor potential differences in referents due to local geography (e.g., the specific 'Coastal Plain' of the southeastern US is a major physiographic province).
Connotations
Similar technical connotations. In the UK context, may more frequently evoke historical references (e.g., the Fens, Romney Marsh). In the US, it strongly connotes the Atlantic and Gulf Coastal Plains.
Frequency
Slightly higher frequency in American English due to the prominence of the Atlantic and Gulf Coastal Plains in geography, agriculture, and history.
Grammar
How to Use “coastal plain” in a Sentence
The [adjective] coastal plain [verb of extension] for [distance].The coastal plain is [verb of description].Vocabulary
Collocations
Examples
Examples of “coastal plain” in a Sentence
verb
British English
- [The word is not used as a verb.]
American English
- [The word is not used as a verb.]
adverb
British English
- [The word is not used as an adverb.]
American English
- [The word is not used as an adverb.]
adjective
British English
- [Rare and non-standard. 'Coastal-plain soils' uses the compound as a modifier.]
American English
- [Rare and non-standard. 'Coastal-plain geology' uses the compound as a modifier.]
Usage
Meaning in Context
Business
Rare, except in sectors like real estate development, agriculture ('coastal plain vineyards'), or tourism marketing.
Academic
Very common in geography, geology, environmental science, and history texts to describe landforms and human-environment interaction.
Everyday
Used when describing geography, travel, or one's home region in a detailed way.
Technical
Core term in physical geography, geomorphology, and cartography with precise definitions based on formation processes (alluvial, marine).
Vocabulary
Synonyms of “coastal plain”
Strong
Neutral
Weak
Vocabulary
Antonyms of “coastal plain”
Watch out
Common Mistakes When Using “coastal plain”
- Using it as an adjective (e.g., 'coastal plain region' is redundant; 'coastal plain' is the region).
- Confusing it with 'coastline' or 'beach'.
- Incorrectly capitalizing when not part of a proper name (e.g., 'the Coastal Plain' vs. 'a coastal plain').
FAQ
Frequently Asked Questions
No. A beach is a narrow, specific landform of sand or pebbles at the immediate shoreline. A coastal plain is a much broader, flat land area that extends inland from the coast.
Generally, a plain is defined by low relief. A coastal plain may have very gentle, rolling hills, but it is predominantly flat. If the terrain becomes significantly hilly, it transitions into another landform, such as coastal hills or a plateau.
They often have deep, fertile soils deposited by rivers and ancient seas, flat terrain suitable for mechanized farming, and (historically) easy access to water transport for moving goods.
A coastal plain is defined by its location adjacent to a coast and can be formed by various processes. A floodplain is specifically the flat land adjacent to a river that is subject to flooding. A river's floodplain may be located within a larger coastal plain.
A flat, low-lying area of land adjacent to a seacoast, often formed by sedimentary deposits and characterized by gentle slopes.
Coastal plain is usually formal, academic, technical, geographic in register.
Coastal plain: in British English it is pronounced /ˈkəʊstl̩ ˈpleɪn/, and in American English it is pronounced /ˈkoʊstl̩ ˈpleɪn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[None directly associated. The term is technical.]”
Learning
Memory Aids
Mnemonic
Think of a plain (flat land) that has a coat of sea next to it – a COASTal plain.
Conceptual Metaphor
A FOUNDATION or BASKET – as it often serves as the base for sedimentary deposition and fertile soil for agriculture.
Practice
Quiz
Which of the following is NOT a typical characteristic of a coastal plain?