Definition of pleura

• n. - pl. of Pleuron.
• n. fem. - The smooth serous membrane which closely covers the lungs and the adjacent surfaces of the thorax; the pleural membrane.
• n. fem. - The closed sac formed by the pleural membrane about each lung, or the fold of membrane connecting each lung with the body wall.
• n. fem. - Same as Pleuron.
• pl. - of Pleuron