Question 1

What does "filter up" mean?

Accepted Answer

Of information, concerns, or trends: to gradually rise from lower levels of a hierarchy to those in positions of authority.

Question 2

How do you use "filter up" in a sentence?

Accepted Answer

Staff concerns about safety eventually filtered up to the board of directors.

Question 3

Is "filter up" formal or informal?

Accepted Answer

"filter up" is register-neutral — appropriate in both casual and formal contexts. Less common than 'filter down'. Used in business, political, and social analysis. Describes a bottom-up spread of information, trends, or feelings. Often implies that the process is slow and may be incomplete.

filter up

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