B1
relaxed and not worried, frightened, or excited
Dictionary examples:
The student was so calm, he napped through his final exam. (0.0)
The pilot was so calm, he ordered pizza during engine trouble. (0.0)
My dad is so calm, he yawns during horror movies. (0.0)
Now keep calm everyone, the police are on their way. (21.9)
Try to stay calm - the doctor will be here soon. (22.5)
He has a very calm manner/voice. (32.3)