Shut forcibly and noisily (4)

I believe the answer is:
slam
(Other definitions for slam that I've seen before include "Ambitious contract" , "Shut loudly and forcibly" , "big contract" , "Shut violently" , "Hit hard" .)
I believe the answer is:
slam
(Other definitions for slam that I've seen before include "Ambitious contract" , "Shut loudly and forcibly" , "big contract" , "Shut violently" , "Hit hard" .)