What does downstairs mean?
Downstairs is a versatile English word that refers to a lower floor of a building. Most commonly it serves as an adverb describing movement toward or location on that floor, as in 'She went downstairs to make coffee.' It also functions as an adjective ('the downstairs office') and, less frequently, as a noun meaning the ground floor itself ('the fire started in the downstairs'). The word is transparently formed from 'down' plus 'stairs,' and its natural opposite is 'upstairs.' Neutral in tone and equally at home in British and American usage, it requires no preposition: people go downstairs rather than to downstairs. Because homes and public buildings are so central to daily life, downstairs appears constantly in ordinary conversation and fiction alike, making it a small but essential piece of everyday vocabulary.
To or on a lower floor of a building.
"He crept downstairs so as not to wake anyone."
Situated on, relating to, or characteristic of a lower floor of a building.
"The downstairs rooms stay cooler in summer."
The ground floor or lower level(s) of a building.
"They live upstairs and rent out the downstairs."
Unlike most direction words, "downstairs" works as three parts of speech at once — adverb, adjective, and noun — all in a single word.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does downstairs come from?
Downstairs is a straightforward compound of the native English words 'down' (from Old English 'dūne,' originally 'off the hill') and 'stairs' (from Old English 'stǣger,' related to climbing). The compound arose in English during the early modern period, alongside its mirror form 'upstairs,' as multi-storey domestic architecture became widespread. It shares its second element with other stair-related compounds such as 'staircase' and 'stairwell.'
How downstairs is actually used
Fully standard in both British and American English and neutral in register. When used as a noun it often takes no article in British English ('the flat is downstairs') but commonly takes 'the' in American English ('in the downstairs'). It functions as an adverb without any preposition — one goes downstairs, not *to downstairs*.
Easily confused with downstairs
"Downstair" is an archaic variant used only as an adjective; modern English uses "downstairs" for both adverb and noun.