sub-level

American  

[suhb-lev-uhl] / ˈsʌbˌlɛv əl /

noun

Mining.

1. a drift, dug through ore, into which overlying material, especially from an upper layer of ore, is caved.

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Example Sentences

The Fulton, a new family-run events venue and caterer, signed a five-year lease for the 2,300-square-foot sub-level with its own private entrance in this two-story building.

From New York Times

I imagine he’s explaining to his alien colleague the annual benefits of an Amazon Prime membership, while in a deeper sub-level of his mind wondering, as many great intellectuals have before him, how long it will be until he once again lock eyes with a camera and eat.

From The Verge

Stonegate also intends to downsize parking spaces on the site, construct a sub-level parking garage and improve landscaping in the area.

From Washington Times

Or, rely on tags instead for organizing by that sub-level of detail, as explained below.

From Time

This sub-level is more than a place; it's a mental state.

From The Guardian