: belonging only to the person or group specified. 1  She has the sole authority to hire new staff members. [=only she can hire new staff members] 2  He has sole jurisdiction of the area.
Dr. Stern responded: Dead space in lung. Dead space is a term used to describe an area of the lung where gas exchange cannot occur - it does not mean dead lung tissue. Everyone has dead space and it is comprised mainly of your airways. It is measured as a percentage. Dead space is affected by many variables including the size of the breath we inhale.
Medical Definition of DEAD SPACE. 1. : space in the respiratory system in which air does not undergo significant gaseous exchangeâsee anatomical dead space, physiological dead space. 2.: a space (as that in the chest following excision of a lung) left in the body as the result of a surgical procedure.efinition of DEAD SPACE. : the portion of the respiratory system which is external to the bronchioles and through which air must pass to reach the bronchioles and alveoli. ADVERTISEMENT. noun.