Did you know?

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


 - definitions and thesaurus

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. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

verb [transitive] synthesize pronunciation in British English /ˈsɪnθəsaɪz/ 
Word Forms
present tense
present participlesynthesizing
past tensesynthesized
past participlesynthesized
  1. 1
    science to produce a new substance as a result of a chemical or biological reaction involving two or more simpler substances

    Green plants synthesize carbohydrates from carbon dioxide and water.

    synthesized drugs

  2. 2
    to combine different ideas, styles, or systems into a single idea or system

    The final chapter attempts to synthesize the arguments.

  3. 3
    to produce sounds using a synthesizer

    synthesized sounds/melodies


web content which is specifically intended to make Facebook users click the 'Like' button associated with it

BuzzWord Article

Open Dictionary


the possibility of Greece leaving the Eurozone …

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