Did you know?

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

rein - 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 rein pronunciation in British English /reɪn/
Word Forms
present tense
present participlereining
past tensereined
past participlereined

phrasal verb

rein in

Word Forms
present tense
I/you/we/theyrein in
he/she/itreins in
present participlereining in
past tensereined in
past participlereined in
  1. 1

    rein in


    rein back

    [transitive] to limit or control something that has developed too much or has continued for too long

    France has asked its EU partners to rein in their criticism of nuclear testing.

  2. 2
    [intransitive/transitive] to make a horse stop or go more slowly by pulling its reins


to fall over forwards so that your face hits the ground or another surface

BuzzWord Article

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