n. 1. Physical or mental weariness resulting from effort or activity. 2. Something, such as tiring effort or activity, that causes tiredness or weariness: the fatigue of a long hike. 3. Physiology The decreased capacity or complete inability of an organism, organ, or part to function normally because of excessive stimulation or prolonged exertion. 4.
blood - the fluid (red in vertebrates) that is pumped through the body by the heart and contains plasma, blood cells, and platelets; blood carries oxygen and nutrients to the tissues and carries away waste products; the ancients believed that blood was the seat of the emotions
Save. blood /ËblÊd/ noun. blood. /ËblÊd/. noun. Learner's definition of BLOOD. [noncount]. 1. : the red liquid that flows through the bodies of people and animals. â see also bad blood, cold-blooded, full-blooded, hot-blooded, red-blooded, warm-blooded.The accident victim has already lost a lot of blood.earner's definition of BLOOD. [noncount]. 1. : the red liquid that flows through the bodies of people and animals. â see also bad blood, cold-blooded, full-blooded, hot-blooded, red-blooded, warm-blooded.