breath ‧ ing /ˈbriːðɪŋ/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ breath , ↑ breather , ↑ breathing ; adjective : ↑ breathless , ↑ breathy ; verb : ↑ breathe ; adverb : ↑ breathlessly ]
the process of breathing air in and out:
His breathing was deep and regular.
When I picked up the phone, all I heard was heavy breathing (=loud breathing) .