Did you know?

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

ally - definition and synonyms

Close
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.

Close
ThesaurusThesaurus
Thesaurus diagram

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.

more
verb [intransitive/transitive]     ally pronunciation in British English
/əˈlaɪ/    ally pronunciation in British English
/ˈælaɪ/
Word Forms
Close
present tense
I/you/we/theyally
he/she/itallies
present participleallying
past tenseallied
past participleallied
  1. 1
    if a country allies itself with another country, it makes an agreement with it that they will work together to help each other, especially in a war

    countries that have allied themselves with the West

  2. 2
    if you ally yourself with someone, you work together to help each other

    We should ally ourselves with companies that complement our strengths.

  3. 3
    if you ally yourself with something such as a belief or an organization, you show your strong support for it
quiz invitation
BuzzWord

gig economy

an employment concept in which people are paid for each specific, short-term task that they do and don't have conventional contracts of employment

BuzzWord Article

Word of the Day

gosling

a young goose

Open Dictionary

fake news

a sensational piece of news which does not map to reality, created to attract attention or damage somebody's reputation

add a word

Blog

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