Noun
a pocket inside of a man's coat
Source: WordNetBut while in a small boat in a lake or bay in the mid 60s, he leaned over the side, and his notebook fell out of his breast pocket into the water, where it was lost forever. Source: Internet
Kipling became friends with a French soldier named Maurice Hammoneau whose life had been saved in the First World War when his copy of Kim, which he had in his left breast pocket, stopped a bullet. Source: Internet
Every so often, she would glance down at it, smile, then put it back in her uniform breast pocket. Source: Internet
Then he suddenly pulled out an electronic gadget from the breast pocket of his safari suit and fed the American bank notes into the counterfeit detector. Source: Internet