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Definition of sundial
sundial
/ˈsʌn.daɪ.əl/
sun · di · al
Plural:sundials
sundial Lexical Profile
CEFR
B2
Grade
4
Tier
2
Usage
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• noun
1
An instrument that indicates the time of day by the position of a shadow cast by the sun onto a marked surface.
Example
"The ancient Romans relied on a marble sundial in the city square to keep track of the passing hours."
Synonyms
View all synonyms for sundialWord Origin & Etymology
From Middle English, combining 'sun' and 'dial' (which originally referred to the daily church services and later the face of a clock).
Cite this Entry
Wordmom. (2026). Definition of Sundial. In Wordmom Dictionary. Retrieved Oct 14, 2026, from https://wordmom.com/dictionary/sundial