Did you know?

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

research - definition and synonyms


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] research pronunciation in British English /rɪˈsɜː(r)tʃ/research pronunciation in British English /ˈriːsɜː(r)tʃ/
Word Forms
present tense
present participleresearching
past tenseresearched
past participleresearched
  1. 1
    to make a detailed study of something in order to discover new facts

    They have been researching the effects of the drug on mice.

    The subject has not been fully researched before.

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

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
Macmillan learn live love play