A structure for storing bulk materials. Silos are most commonly used for bulk storage of grain, coal, cement, carbon black, woodchips, food products and sawdust. Three types of silos are in widespread use today: tower silos, bunker silos, and bag silos.
Merriam-Webster Online Dictionary
silo (noun)1.
a trench, pit, or especially a tall cylinder (as of wood or concrete) usually sealed to exclude air and used for making and storing silage
2.
a) a deep bin for storing material (as coal)
b) an underground structure for housing a guided missile
Compartment, storage unit, container, repository, vault
