a tall tower on a farm used for storing grain, etc. 筒仓 
In modern mills, grain is stored in silos which are often separate from the mill. 在现代工厂中，谷物存储在通常与工厂分开的筒仓中。 The grass is cut for hay, then some of it is stored in silos. 将草切成干草，然后将其中的一些存储在筒仓中。
an underground place where nuclear weapons or dangerous substances are kept （核武器的）发射井；（危险物品的）地下贮藏库 It is believed there are missile silos located in the desert. 据信在沙漠中有导弹发射井。
an underground place where silage is made and stored 青贮窖 a system, process, department, etc. that operates separately or is thought of as separate from others 独立运行的系统（或流程、部门等） Some departments have become silos and no longer communicate regularly with one another. 一些部门已各自为政，不再定期相互沟通。 In some countries, the economy and foreign policy are considered in separate silos. 在一些国家，经济和外交政策被视为相互独立的范畴。
Word Originmid 19th cent.: from Spanish, via Latin from Greek siros ‘corn pit’.