stereo

stereo — noun

1. a set of electronic devices for playing music or radio, usually including a play

1.nounA2
Definition

a set of electronic devices for playing music or radio, usually including a player, an amplifier, and two speakers that produce left and right channel sound.

Example

Jason bought a new stereo for his living room, with speakers that connect wirelessly.

countable: a stereo / the stereo

The old stereo in the basement still works, though the CD tray sometimes gets stuck.

Common collocations
  • stereo system
  • turn up the stereo
  • stereo speakers
  • portable stereo
  • car stereo
Synonyms
  • sound system

    more general term that may include additional components like a subwoofer or surround-sound speakers

  • hi-fi

    short for 'high fidelity'; emphasises high-quality sound reproduction, slightly dated but still in use

Grammar Patterns

stereo + noun

a/the stereo

Usage Note

Countable and commonly used both with and without an article: 'a stereo' (any device) or 'the stereo' (a specific one). 'Stereo' can also function as a modifier before a noun, e.g. 'stereo speakers', 'stereo system.' As electronic devices have become smaller, 'stereo' increasingly overlaps with 'soundbar,' 'smart speaker,' and 'home theatre system.'

Common Mistakes

I listened to music on my stereo headphones.' (headphones are not a stereo)
I listened to music on my stereo.' or 'I used my stereo headphones.
'stereo' as a noun is the device itself; as an adjective it describes the type of headphones.

2. a method of recording or broadcasting sound that splits audio into left and righ

2.nounB1
Definition

a method of recording or broadcasting sound that splits audio into left and right channels, giving a fuller listening experience than a single-channel system.

Example

Most radio stations now broadcast in stereo, giving listeners a richer sound experience.

collocation: broadcast/record/play in stereo

The album was mixed in stereo so each instrument sits clearly in its own channel.

in stereo + left/right channel description

Common collocations
  • in stereo
  • broadcast in stereo
  • record in stereo
  • stereo recording
  • stereo sound
Synonyms
  • stereophonic sound

    the full technical term for this format; more formal and less common in everyday speech

Antonyms
  • mono

    single-channel sound recording or playback, without left-right separation

Grammar Patterns

in stereo

broadcast/record/play in stereo

Usage Note

Uncountable in this sense — you say 'broadcast in stereo', not 'broadcast in a stereo.' The phrase 'in stereo' is the most common grammatical frame for this meaning.

Common Mistakes

I bought a new stereo for my car.' (when referring to a device, not the format)
I bought a new stereo system for my car.
'stereo' as an uncountable noun refers to the sound format, not the physical equipment.

stereo — adjective

Word family

  • stereophonic
    adjectiveC1
  • stereoscopic
    adjectiveC1
  • stereoscope
    nounC2
  • stereophony
    nounC2

Synonym discussion

Sense: noun/1

All four terms refer to audio playback equipment, but they differ in scope and emphasis. 'Stereo' is the most common everyday word for a complete music-playing setup, typically including a player, amplifier, and two speakers. 'Sound system' is broader — it can refer to anything from a small Bluetooth speaker to a large concert rig; it does not specifically imply two-channel sound. 'Hi-fi' (short for 'high fidelity') emphasises accurate sound reproduction and was widely used from the 1960s through the 1990s; today it sounds slightly old-fashioned but still appears in audiophile contexts. 'Speakers' refers only to the output devices, not the entire system — you would say 'I need new speakers for my stereo,' not 'I need a new speakers.' In everyday conversation: 'We brought a stereo to the beach party' sounds natural, while 'We brought a hi-fi' sounds dated, and 'We brought a sound system' may sound too large or formal.

stereo ↗sound systemhi-fi ↗speakers

Common collocations

Nouns

Prepositions

Etymology

GreekEnglish

'Stereo' was first used in English during the 1800s as a clipping of 'stereoscope' and 'stereoscopic,' which come from the Greek word 'stereos' meaning 'solid' or 'three-dimensional.' In the 1870s, it referred to equipment for viewing 3D photographs. In the 1950s, the term was borrowed again for 'stereophonic sound' (Greek 'stereos' + 'phone' meaning 'sound') — a recording method that gives sound a sense of depth and space. The same word then extended from the format to the equipment itself, giving us today's dual meaning: one for the sound format, one for the physical device that plays it.