mean noon: meaning, definition, pronunciation and examples
C1Technical / Academic
Quick answer
What does “mean noon” mean?
The moment when the mean sun crosses the local meridian, defining noon for civil timekeeping purposes, averaged over a year.
Audio
Pronunciation
Definition
Meaning and Definition
The moment when the mean sun crosses the local meridian, defining noon for civil timekeeping purposes, averaged over a year.
Used in astronomy and navigation to distinguish civil noon from solar noon, which can vary throughout the year due to the equation of time. It provides a stable, uniform time reference.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or definitional differences; it is an international scientific term.
Connotations
Neutral and technical in both dialects.
Frequency
Extremely low frequency in general discourse but standard in relevant technical fields in both regions.
Grammar
How to Use “mean noon” in a Sentence
Local Mean N occurs at [time]The [event/measurement] was synchronized with mean noon.Vocabulary
Collocations
Examples
Examples of “mean noon” in a Sentence
adjective
British English
- The mean noon data is recorded in the nautical almanac.
- The mean noon sun's position was plotted.
American English
- The mean noon measurement was critical.
- He provided the mean noon coordinates.
Usage
Meaning in Context
Academic
Used in astronomy, navigation, geodesy, and history of science.
Everyday
Virtually never used.
Technical
Essential for defining time zones, calculating longitude, and celestial navigation.
Vocabulary
Synonyms of “mean noon”
Strong
Neutral
Weak
Vocabulary
Antonyms of “mean noon”
Watch out
Common Mistakes When Using “mean noon”
- Using it interchangeably with 'solar noon' or 'high noon'.
- Misinterpreting 'mean' as unkind or low-quality.
FAQ
Frequently Asked Questions
No. 'High noon' colloquially refers to midday, often dramatized. 'Mean noon' is a precise technical term based on the average motion of the sun.
Because the actual sun's transit time varies throughout the year. Mean noon provides a stable, uniform time standard for clocks and schedules.
Historically used by navigators, astronomers, and surveyors. Today, it's relevant for historians of science, some astronomers, and horologists (clockmakers).
It is a fictitious sun conceived to move at a constant average speed along the celestial equator, making the length of all days exactly 24 hours.
The moment when the mean sun crosses the local meridian, defining noon for civil timekeeping purposes, averaged over a year.
Mean noon is usually technical / academic in register.
Mean noon: in British English it is pronounced /ˌmiːn ˈnuːn/, and in American English it is pronounced /ˌmin ˈnun/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of it as the 'average noon' – MEAN in the sense of statistical average.
Conceptual Metaphor
Time as a uniform, measurable grid (contrasted with natural, variable solar time).
Practice
Quiz
What is 'mean noon' best defined as?