basement

noun

base·​ment ˈbās-mənt 

1

: the part of a building that is wholly or partly below ground level

2

: the ground floor facade or interior in Renaissance architecture

3

: the lowest or fundamental part of something

specifically : the rocks underlying stratified rocks

4

chiefly New England : a toilet or washroom especially in a school

5

a

: a low state, rank, or condition

With their stock in the basement and red ink all over their balance sheet, many struggling [companies] are finding that fund-raising has become an exceedingly difficult proposition.

—Brad Stone

b

: the lowest place in the standings : cellar sense 2

Last year, the Phillies finished in the basement of the NL East with 68 wins, tied with the Cubs for the fewest wins in the league.

—Boston Herald

basementless

ˈbās-mənt-ləs 

adjective

Synonyms of basement

• cellar

Examples of basement in a Sentence

we store our bicycles in the basement during the winter

the basement of the outdoor fountain needs a lot of restoration work

Recent Examples on the Web

The pool is perhaps the best indoor dip in the city; though it’s housed in the basement and there are no windows, the soft lighting from the lanterns adds to the moody and serene atmosphere. —Condé Nast, Condé Nast Traveler, 7 Mar. 2026

In the event of a tornado, individuals should seek shelter in a basement or interior room, away from windows, the NWS said. —Caroline Zimmerman, Kansas City Star, 6 Mar. 2026

Without proper circulation, any water from leaks or condensation just linger, and if it’s not addressed—which is often the case in a space like the basement—then mold and mildew forms. —Quincy Bulin, Southern Living, 6 Mar. 2026

The latest film from Polish filmmaker Jan Komasa follows a 19-year-old degenerate raver from London who, in the last gasp of an all-time bender, is kidnapped by Stephen Graham and chained up in the basement of a posh estate. —Ryan Lattanzio, IndieWire, 6 Mar. 2026

Word History

Etymology

base entry 1 or base entry 2 + -ment, probably after Italian basamento

First Known Use

1730, in the meaning defined at sense 1

Phrases Containing basement

• bargain-basement
• basement membrane
• finished basement/attic
• sub-basement

Rhymes for basement

• abasement
• debasement
• defacement
• displacement
• effacement
• emplacement
• encasement
• misplacement
• outplacement
• replacement
• placement

Kids Definition

basement

noun

base·​ment ˈbās-mənt 

: the part of a building that is entirely or partly below ground level