A functional silo is a business's internal labor division that only focuses on functional objectives. This is important because it is something to be avoided due to creating negative barriers and keeping a business from focusing on its more important missions.

The Functional approach is vertical in nature, with operations grouped as a functional unit. Typical of a departmental grouping. The Process approach is horizontal in nature and each operation cuts across different functions. Typical of Team leaders managing a particular customer item.

The past tense of the word "silo" is "siloed."

Huey Silo

It means something that happened to the silo