Longman Dictionary of Contemporary English homepage

rocket science

 noun
     
rocket science

something is not rocket science

informal used to say that something is not difficult to do or understand:
Designing a website may be a lot of work but it's not rocket science.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary

Browse the dictionary