Abscesses occur when an area of tissue becomes infected and the body's immune system tries to fight it. White blood cells move through the walls of the blood vessels into the area of the infection and collect within the damaged tissue. During this process, pus forms.
cognition cogÂ·niÂ·tion (kÅg-nÄ­sh'Én) n. The mental faculty of knowing, which includes perceiving, recognizing, conceiving, judging, reasoning, and imagining.
Princeton's WordNet(4.00 / 1 vote)Rate this definition: 1  subjective(adj) taking place within the mind and modified by individual bias. a subjective judgment. 2  immanent, subjective(adj) of a mental act performed entirely within the mind. a cognition is an immanent act of mind.