Simple Definition of lifeblood
: the most important part of something : the part of something that provides its strength and energy
: a person's blood
Full Definition of lifeblood
1 : blood regarded as the seat of vitality
2 : a vital or life-giving force or component <freedom of inquiry is the lifeblood of a university>
Examples of lifeblood in a sentence
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
First Known Use of lifeblood
Seen and Heard
What made you want to look up lifeblood? Please tell us where you read or heard it (including the quote, if possible).