Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “lifeblood”


noun [U] uk   /ˈlaɪf.blʌd/ us  
the thing that is most important to the continuing success and existence of something else: Tourism is the lifeblood of Hawaii's economy.Important and essential thingsInformation and messages
(Definition of lifeblood from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of lifeblood?
Add Cambridge dictionaries to your browser to your website

Definitions of “lifeblood” in other dictionaries

Translations of “lifeblood”

Word of the Day


a type of dark brown beer with a bitter taste

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More