Subbasement
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 A basement located beneath another basement
"Joan H. Geismar is trying to unravel the mystery of old stone walls in the subbasement of Federal Hall National Memorial on Wall Street."
Example
More examples"Little-remembered now is that Grand Central Terminal was the target of a Nazi plot during WWII: Two German agents were dispatched to sabotage the giant rotary convertors in a deep subbasement that supplied electrical current for the railways."
Etymology
From sub- + basement.
More for "subbasement"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.