Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “astrophysics”

See all translations

astrophysics

noun [U] uk   /ˌæs.trəʊˈfɪz.ɪks/ us    /-troʊ-/
the type of astronomy that uses physical laws and ideas to explain the behaviour of the stars and other objects in space
astrophysical
adjective uk   /-ɪ.kəl/ us    /-troʊ-/
astrophysicist
noun [C] uk   /-ɪ.sɪst/ us    /-troʊ-/
someone who studies astrophysics
Translations of “astrophysics”
in Chinese (Traditional) 天體物理學…
in Chinese (Simplified) 天体物理学…
(Definition of astrophysics from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of astrophysics?
Add Cambridge dictionaries to your browser to your website

Word of the Day

piglet

a baby pig

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