noun, plural silos, verb, siloed, siloing.
1. a tower-like structure, proofed against weather and vermin, for storing grain.
2. a similar structure in which fermenting green fodder is preserved for future use as silage.
3. Also, pit silo. Chiefly US. a pit or underground watertight space for storing grain, green feeds, etc.
4. an underground launching site for a ballistic missile.
-- verb (t)
5. to put into or preserve in a silo.
[Sp., from L sirus, from Greek si rós pit to keep grain in]