Did you know?

Click any word in a definition or example to find the entry for that word


 - definition

What are red words?

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.

adjective efficient pronunciation in British English /ɪˈfɪʃ(ə)nt/
  1. something that is efficient works well and produces good results by using the available time, money, supplies etc in the most effective way

    The new machine is far more efficient than the old one.

    efficient way/method:

    The most efficient way to plan is to put your tasks in order of priority.

    make efficient use of something:

    This process makes efficient use of limited resources.

    1. a.
      someone who is efficient works well and quickly and is good at organizing their work in the way that gets the best results

      The hotel's staff are friendly and efficient.

      highly efficient:

      He became a highly efficient General Secretary.

derived word


 efficient pronunciation in British English  adverb


a paid holiday given to a new employee before they start their job

BuzzWord Article

Open Dictionary

selfie stick

an expandable stick which you attach to a mobile phone or camera to help you take a selfie …

add 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