Definition of lifeblood
- freedom of inquiry is the lifeblood of a university
The town's lifeblood has always been its fishing industry.
The neighborhoods are the lifeblood of this city.
the lifeblood that flows through his veins
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lifeblood.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: the most important part of something : the part of something that provides its strength and energy
: a person's blood
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