#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 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
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