0 a friend that you like a lot and have a very close relationship with:
They were never to become what you would call bosom friends.
"He was my bosom buddy, my best friend," his father said, his voice breaking.
Where was the bosom friend and confidant, the guide, philospher and friend.
Every effort was made because he was his bosom friend, and had been his best man at the wedding less than six months before.
Alexius suddenly grew cold towards his own "bosom friend" (as he called him).
His name signifies bosom friend, play-fellow or companion.
They were bosom friend and leaders of political party.
