Blood/blʌd/ Definition 1 of 5Pro Tip 1/3Idiomatic Expressions Understand phrases like 'blue blood' which refers to nobility, not actually blue in color. Despite being a blue blood, she's very down-to-earth. Pro Tip 2/3Vivid Imagery 'Blood' often evokes strong emotions or indicates seriousness in situations or discussions. The boxer was fighting with blood and sweat. Pro Tip 3/3Literal Usage 'Blood' can mean actual blood for medical or biological contexts, like blood cells or blood transfusion. She donated blood at the local hospital.