- breathing, 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
 --1 is a kind of bodily process, body process, bodily function, activity
 --1 has parts:
 --1 has particulars:exhalation, expiration, breathing out; inhalation, inspiration, aspiration, breathing in