greenwich time: meaning, definition, pronunciation and examples
C1Technical / Formal
Quick answer
What does “greenwich time” mean?
The official, internationally accepted standard time, historically based on the mean solar time at the Royal Observatory in Greenwich, London.
Audio
Pronunciation
Definition
Meaning and Definition
The official, internationally accepted standard time, historically based on the mean solar time at the Royal Observatory in Greenwich, London.
A term often used to denote standardised, coordinated universal time (UTC), which serves as a global reference for timekeeping in aviation, computing, and international communication.
Dialectal Variation
British vs American Usage
Differences
In British English, 'Greenwich Mean Time' or 'GMT' is more common than 'Greenwich Time'. In American English, 'Greenwich Time' might be used slightly more often in formal or historical writing, but 'Eastern Standard Time' or 'Coordinated Universal Time (UTC)' are more typical references.
Connotations
In British English, it conveys historical prestige and global influence. In American English, it often connotes an external, international standard.
Frequency
Low frequency in everyday speech in both dialects; higher in historical, scientific, nautical, or aeronautical contexts.
Grammar
How to Use “greenwich time” in a Sentence
[Event/System] + is set to Greenwich TimeThe conference call is scheduled for 1400 Greenwich Time.Vocabulary
Collocations
Examples
Examples of “greenwich time” in a Sentence
verb
British English
- The network is greenwitched to ensure global sync.
- We need to greenwich our logs for the audit.
American English
- The system greenwiches all timestamps automatically.
- Make sure the software greenwiches the event data.
adverb
British English
- The data is recorded greenwich.
- The broadcast goes out greenwich.
American English
- The server time is set greenwich.
- Schedule the meeting greenwich to avoid confusion.
adjective
British English
- The greenwich meridian is the reference line.
- They kept a greenwich clock in the observatory.
American English
- The report requires a Greenwich timestamp.
- He referenced the Greenwich noon for his calculation.
Usage
Meaning in Context
Business
Used in international finance and global project scheduling: 'All transactions are timestamped in Greenwich Time.'
Academic
Found in history, geography, and physics texts discussing time standardisation.
Everyday
Rare; might appear in travel contexts or when discussing international TV broadcasts.
Technical
Essential in aviation (flight plans), computing (server logs), astronomy, and navigation.
Vocabulary
Synonyms of “greenwich time”
Strong
Neutral
Vocabulary
Antonyms of “greenwich time”
Watch out
Common Mistakes When Using “greenwich time”
- Pronouncing 'Greenwich' as /ɡriːn.wɪtʃ/ (it's /ɡren.ɪtʃ/).
- Using 'Greenwich Time' interchangeably with local time zones without conversion.
- Capitalising 'time' inconsistently (should be capitalised as part of the proper noun).
FAQ
Frequently Asked Questions
In common usage, yes. Technically, GMT is a time zone, while Greenwich Time historically referred to the mean solar time at Greenwich. Today, both are often used to mean UTC.
Due to historical agreements in 1884, the meridian at the Royal Observatory, Greenwich, was chosen as the Prime Meridian (0° longitude), the starting point for global time zones.
Not directly. Your local time is based on an offset from UTC/GMT. You encounter it indirectly in technology (computer clocks, phones), aviation, and global online services.
Pronounce it as 'GREN-itch' (/ˈɡrɛn.ɪtʃ/). The 'w' is silent, and the second syllable rhymes with 'itch'.
The official, internationally accepted standard time, historically based on the mean solar time at the Royal Observatory in Greenwich, London.
Greenwich time is usually technical / formal in register.
Phrases
Idioms & Phrases
- “On Greenwich Time (meaning: punctual, on schedule)”
Learning
Memory Aids
Mnemonic
Think: GREEN which time? The time at GREENwich, the 'green' starting point for the world's time zones.
Conceptual Metaphor
TIME IS A MEASURABLE QUANTITY WITH A SINGLE SOURCE.
Practice
Quiz
What is the modern, precise successor to Greenwich Mean Time?