definition of
breathing

[1] #1 breathing n. [external respiration, respiration, ventilation] the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation. wn

[2] #2 breathing a. [eupneic, eupnoeic] passing or able to pass air in and out of the lungs normally; sometimes used in combination; "the boy was disappointed to find only skeletons instead of living breathing dinosaurs"; "the heavy-breathing person on the telephone". wn