What does the phrase breast heaved mean?

Answer 1

It is an old fashioned expression denoting strong feeling, as when someone sighs deeply. It describes literally and somewhat exaggerates the physical motion of the chest swelling and ebbing with deep passionate sighs.

Answer 2

The phrase "breast heaved" typically describes a strong emotional reaction or physical exertion causing the chest to rise and fall rapidly. It suggests the person is experiencing intense feelings or is physically struggling.