upstairs

upstairs — adverb

1. toward or on the floor that is above the one where you are now, inside a buildin

1.adverbA2
Definition

toward or on the floor that is above the one where you are now, inside a building with more than one level.

Example

The children ran upstairs to brush their teeth before bed.

SVO pattern: run upstairs + infinitive of purpose

Naoko could hear someone playing piano upstairs in the neighbor's apartment.

passive perception: hear + [someone] + [verb]-ing + upstairs

Common collocations
  • go upstairs
  • come upstairs
  • run upstairs
  • head upstairs
  • be upstairs
  • live upstairs
  • carry something upstairs
  • bring something upstairs
Synonyms
  • up the stairs

    more literal and directional; emphasises the staircase itself rather than the floor

  • on the upper floor

    more formal; focuses on location rather than direction

Antonyms

Grammar Patterns

verb + upstairs

be + upstairs

Common Mistakes

I went to the upstairs.
I went upstairs.
As an adverb, 'upstairs' does not take a preposition. Use the noun form ('the upstairs') only when it acts as a subject or object.

2. in a person's mind or relating to their intelligence — for example, saying someo

2.adverbC1
Definition

in a person's mind or relating to their intelligence — for example, saying someone is 'sharp upstairs' means they are clever, while 'not much upstairs' means they are not very bright.

Example

Amira is very sharp upstairs — she solved the whole crossword in under five minutes.

informal: [be] sharp upstairs = intelligent

The coach said his star player was strong upstairs and did not crack under pressure.

informal: [be] strong upstairs = mentally resilient

Common collocations
  • sharp upstairs
  • strong upstairs
  • not much upstairs
  • slow upstairs
Synonyms
  • mentally

    neutral register; standard in formal and academic contexts

  • intellectually

    formal; focuses on reasoning ability rather than general mental state

Grammar Patterns

[be] + adjective + upstairs

[have] + noun + upstairs

Usage Note

Informal. This sense is used in casual expressions about a person's mental or intellectual ability ('sharp upstairs,' 'not much upstairs,' 'slow upstairs'). It is not suitable for formal or academic writing.

Common Mistakes

She is intelligent upstairs.
She is sharp upstairs.
The informal sense pairs with casual adjectives like 'sharp,' 'strong,' 'slow,' or 'not much'; using 'intelligent' sounds unnatural.

upstairs — noun

upstairs — adjective

Word family

Synonym discussion

Sense: adverb/1

'Upstairs' is the everyday word for moving to or being on a higher floor in a building. 'Up the stairs' is more literal and directional — it emphasises the act of climbing the staircase itself, so you might say 'I ran up the stairs to answer the phone' when the staircase is the focus. 'On the upper floor' is more formal and descriptive, often used in writing about buildings or layouts: 'The bedrooms are on the upper floor.' Unlike 'upstairs,' it cannot express direction ('She went on the upper floor' is wrong — you need 'to the upper floor'). For most daily situations, 'upstairs' is the natural choice.

upstairs ↗up the stairson the upper floor

Common collocations

Nouns

Phrases

  • the people upstairs
  • the room upstairs

Prepositions

Etymology

Old EnglishMiddle EnglishEnglish

Formed in Middle English by combining 'up' (meaning to a higher position) with 'stairs' (steps connecting different levels of a building). The word first appeared around the 14th century as a directional term. By the 17th century it was also used as a noun and adjective. The informal 'mental' sense dates from the early 20th century, treating the head as if it were an upper floor of the body.