Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “SI unit”

See all translations

SI unit

noun [C] uk   /ˌesˈaɪˌjuː.nɪt/ specialized us  
a unit of measurement that is part of a system used for scientific and technical work all over the world: The SI unit of length is the metre.
Translations of “SI unit”
in Chinese (Traditional) 國際標準單位…
in Chinese (Simplified) 国际标准单位…
(Definition of SI unit from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of SI unit?
Add Cambridge dictionaries to your browser to your website

Word of the Day

pup

a baby of particular animals, or a puppy

Word of the Day

I won’t tolerate it! Replacing formal words with phrasal verbs.

by Liz Walter,
April 01, 2015
When you are using a language, it is important to understand if a word is formal or informal, so that you can use it in an appropriate way. You might hear people saying dosh for money, or spud for potato, but they wouldn’t write those words in a formal essay. Similarly, a

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More