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.more
The sale of the company will have serious implications for people's jobs.
It's not a serious problem – we should be able to fix it without too much trouble.
a serious head injury
An accident like this poses a serious threat to the environment.
I'm sorry, I didn't realize you were being serious.
The police have made no serious attempt to address these issues.
I'm not convinced they're serious about the deal.
Do you think Mike's serious about going to live in New Zealand?
'Are you serious about leaving your job?' 'Dead serious.'
This is the British English definition of serious. View American English definition of serious.
a plan or course of action that is not possible to achieve
a type of design used on the web which excludes features which give a three-dimensional effect … and uses simple stylesadd a word
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.global English and language change from our blog