Did you know?

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

volunteer - 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.

noun [countable] volunteer pronunciation in American English /ˌvɑlənˈtɪr/
Word Forms
  1. 1
    someone who offers to do something without being forced

    Can I have a volunteer to erase the chalkboard, please?

    volunteer for:

    Doctors need 50 healthy volunteers for the diet.

  2. 2
    someone who is not paid for the work that they do

    a volunteer worker

    volunteer for:

    He is a volunteer for the Gay Helpline.

  3. 3
    someone who joins the military without being forced

sea lion

in an online conversation, repeatedly asking a person questions which suggest that you are interested in what they are talking about, but are actually intended to annoy them

BuzzWord Article

Open Dictionary


an electric skateboard

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