Did you know?

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

keel - 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 keel pronunciation in British English /kiːl/
Word Forms
present tense
present participlekeeling
past tensekeeled
past participlekeeled
  • Facebook
  • Twitter

phrasal verb

keel over

Word Forms
present tense
I/you/we/theykeel over
he/she/itkeels over
present participlekeeling over
past tensekeeled over
past participlekeeled over
  1. 1
    informal if a person keels over, they fall, especially because they unexpectedly feel ill
  2. 3
    to suddenly stop working correctly

    My email system would keel over if I tried to send that much data.


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