Definition of breathe in phrasal verb from the Oxford Advanced American Dictionary

 

breathe in

 phrasal verb
phrasal verb
 
jump to other results
Phrasal Verbs
to take air into your lungs through your nose or mouth synonym inhale I want you to breathe in and hold your breath for as long as possible.

breathe somethingin

 
jump to other results
to take air, smoke, etc. into your lungs through your nose or mouth His illness is a result of breathing in paint fumes over many years.
See the Oxford Advanced Learner's Dictionary entry: breathe in