Click any word in a definition or example to find the entry for that word
90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
The thesaurus of synonyms and related words is fully integrated into the dictionary entries. Click on the T button in an entry to review the synonyms and related words for that meaning.
Mars is sometimes known as the red planet.
policies to protect the future of the planet
The party doesn't seem to be in touch with popular opinion – it's as if they're living on another planet.
This is the British English definition of planet. View American English definition of planet.
Change your default dictionary and thesaurus to American English.
View the pronunciation for planet.
the belief that every problem has a solution based in technology
any of the bones in your foot between your toes and your ankle
any random process, such as a competition in which a name is drawn from a hat
A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.
Definition of planet from the online English dictionary from Macmillan Publishers Limited.