- 1lifeblood (of something) the thing that keeps something strong and healthy and is necessary for successful development Tourism is the lifeblood of the city.
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
- 2(literary) a person's blood, when it is thought of as the thing that is necessary for life The wound was draining the lifeblood from him.
Check pronunciation: lifeblood