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A floor beneath a main basement of a building.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Architecture) an underground storey of a building beneath the main basement
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈsʌbˌbeɪs mənt)

a basement below the main basement of a building.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
Godfrey has lived in the building for 31/2 years, with a flat in the subbasement.
Accordingly, the number of violation actions filed against pilots operating under Part 91 has fallen through the floor into the fourth subbasement. However, when a pilot inadvertently violates a reg or damages an airplane, the counseling he receives from the FAA may include a demand that he take a 709 ride.
Located in the SoHo Cast Iron Historic District, the 21,000 s/f elevatored building contains six residential lofts, one retail store and a subbasement. Situated midblock on the north side of Canal Street between West Broadway and Wooster Street, the ground floor retail space enjoys tremendous foot-traffic throughout the neighborhood and includes a'3,500 s/f rentable basement.
From his office in the subbasement of the Florida Supreme Court, where he served as state courts administrator, Harkness made a second climb up the Bar's front steps and through the portico for his interview, never imagining he would not only get the job at the place he knew very little about, but serve more than half his life at the helm.
Common structural changes in the airway include thickening of the subbasement membrane, excessive mucus secretion, subepithelial fibrosis, inflammatory cell infiltration, and extracellular matrix deposition in the subepithelial layer (You et al.
Aside from being lost most of the time while wandering around its eight floors and three basements (basement, mezzanine and subbasement) looking for the 10 handball courts, I was impressed with the geniality of the staff, members and "guests."
(137) Likewise, Plaintiff Mosko argued that her former place of employment "was frequently being renovated," that new ceilings and a subbasement were under construction, and that invoices from a possible asbestos supplier might indicate the presence of asbestos in the construction.
While unprocessed RCA is useful to be applied as many types of general bulk fill, bank protection, subbasement, road construction, and embankments, processed RCA can be applied to new concrete including lean and structural grade concrete, soil-cement pavement bases, and bituminous concrete [9].
Now Rose finds herself on a post-Dark Times Earth, her stasis tube part of a pile of abandoned junk in a subbasement, and herself the unexpected heir and ward of her dead parents' company.
Dave, aged 38, said: "The building is 500 years old and the dungeons in the subbasement are 743 years old.
The 25-foot-wide building features an elevator and a full-height usable basement and subbasement. Steve Chasanoff of Colliers International Realty is marketing the property.