- lifeblood life‧blood [ˈlaɪfblʌd] noun [singular]the most important thing needed by an organization, country etc in order to continue or develop successfully:
• Cash flow is the lifeblood of any company.
• The companies argue that patents are their lifeblood.
* * *lifeblood UK US /ˈlaɪfblʌd/ noun [S]► the most important thing that someone or something needs in order to continue to exist or operate: »
Education is the lifeblood of a knowledge-based economy.»
She is fantastic at new product development, which is our lifeblood.
Financial and business terms. 2012.