from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A floor beneath a main basement of a building.
from The Century Dictionary.
- noun A basement lower than the main basement of a building. In the largest modern buildings there are sometimes three or four of these, one below another.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
basementlocated beneath another basement
from Wiktionary, Creative Commons Attribution/Share-Alike License
The building isn't without fault: The unexpected discovery of an underground wellspring early in the construction process forced Mr. Kahn to cancel plans for a subbasement and to build the library 1½ stories higher than planned, contributing to the bulky feel of the exterior.
A video pre-confession from every bomber could still not explain why the subbasement was blown up ...
For all the horrors you hear about Congress's poisoned atmosphere—its paralysis, its subbasement approval ratings—the handsome marble hallways, filled with American flags, still gleam; wide-eyed constituents still travel them; and it's still hard not to find yourself with something resembling a lump in your throat.
Julia was pretty sure the library didn't have any subbasement stacks, because it didn't have a subbasement.
The call number was odd—it put the book in the subbasement stacks.
These included the Manhattan Project and housing the 'Arsenal' robots in a hidden subbasement in his mansion.
Three years after the crisis began with a burp in the subprime subbasement, these questions elicit scant consensus.
The dropping sensation in her stomach was just an ordinary dropping sensation, the kind you get when you're descending rapidly toward a subbasement full of cheap metal shelving and the buzz of fluorescent lights and exposed pipes with red-painted daisy-wheel valve handles poking out of them at odd angles.
It reached high into the room, standing some four stories taller than the ground floor, and it fell away below their feet into a vastly deep subbasement.
Befitting our status, the CRs were in the subbasement, under the parking garage and next to the print shop.