B1
a weapon that you fire bullets out of
Dictionary examples:
He tried to rob a store with a toy gun, but it squeaked. (0.0)
My grandma keeps a water gun to scare away squirrels from her garden. (0.0)
The magician pulled a rabbit out of his gun instead of his hat. (0.0)
You could hear the noise of guns firing in the distance. (36.2)