high sea: meaning, definition, pronunciation and examples
C1Formal, Legal, Technical (Maritime)
Quick answer
What does “high sea” mean?
The open ocean far from the coast, beyond territorial waters.
Audio
Pronunciation
Definition
Meaning and Definition
The open ocean far from the coast, beyond territorial waters.
International waters not under the jurisdiction of any single country; often used in legal contexts regarding piracy, fishing rights, and freedom of navigation.
Dialectal Variation
British vs American Usage
Differences
No significant semantic difference. Both use the plural 'high seas' predominantly.
Connotations
Primarily legal or maritime in both varieties.
Frequency
More frequent in British English due to stronger maritime heritage and legal discourse, but equally understood in American English.
Grammar
How to Use “high sea” in a Sentence
on + the + high seasthe + high seas + ofbeyond + the + high seasVocabulary
Collocations
Examples
Examples of “high sea” in a Sentence
verb
British English
- The treaty regulates what vessels can discharge while on the high seas.
- The Royal Navy patrolled the high seas.
American English
- The Coast Guard interdicted the vessel on the high seas.
- Federal law applies to US-flagged ships on the high seas.
adjective
British English
- High-seas fishing fleets require special licenses.
- They were accused of high-seas piracy.
American English
- The high-seas adventure novel was a bestseller.
- High-seas jurisdiction is a complex issue.
Usage
Meaning in Context
Business
Refers to shipping logistics, insurance, and international trade routes.
Academic
Used in international law, maritime history, and environmental studies discussing ocean governance.
Everyday
Rare in casual conversation; used in news reports about piracy or maritime incidents.
Technical
Core term in maritime law and navigation, denoting waters beyond 12 nautical miles from shore.
Vocabulary
Synonyms of “high sea”
Strong
Neutral
Weak
Vocabulary
Antonyms of “high sea”
Watch out
Common Mistakes When Using “high sea”
- Using the singular 'high sea' in formal/legal contexts.
- Confusing it with 'high tide'.
- Misinterpreting it as describing rough or stormy seas rather than a jurisdictional area.
FAQ
Frequently Asked Questions
The standard term, especially in legal contexts, is the plural 'high seas'. The singular 'high sea' is archaic or poetic.
No, not inherently. It refers to jurisdictional status (international waters), not sea conditions, though it's often associated with historical dangers like piracy.
Under international law, the high seas generally begin beyond a nation's Exclusive Economic Zone (EEZ), which typically extends 200 nautical miles from the baseline.
Generally, only on vessels flying its own flag. Enforcement against foreign-flagged vessels is limited and governed by international law and treaties.
The open ocean far from the coast, beyond territorial waters.
High sea is usually formal, legal, technical (maritime) in register.
High sea: in British English it is pronounced /ˌhaɪ ˈsiː/, and in American English it is pronounced /ˌhaɪ ˈsiː/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[to be] all at sea (related conceptually)”
- “high seas adventure (common in fiction titles)”
Learning
Memory Aids
Mnemonic
Think 'HIGH above national jurisdiction' and 'SEA' as ocean. High seas = legally high (above) any one country.
Conceptual Metaphor
THE OCEAN IS A LEGAL SPACE (often depicted as a 'lawless' or 'free' zone).
Practice
Quiz
What is the primary meaning of 'high seas'?