compact

compact — adjective

1. having parts that are placed very close to each other so that the whole thing is

1.adjectiveB2
Definition

having parts that are placed very close to each other so that the whole thing is small, neat, and uses space well — like a camera that fits in a pocket or soil that is pressed into a hard layer.

Example

Theo bought a compact digital camera that fits easily into his jacket pocket.

collocation: compact [device] — small and portable

Heavy rain made the garden soil so compact that water could not drain through.

predicative use: soil becomes / is compact

Common collocations
  • compact camera
  • compact size
  • compact design
  • compact apartment
  • compact car
  • compact disc (CD)
  • compact package
  • compact layout
  • compact form
Synonyms
  • dense

    focuses on how tightly packed the parts are, without the 'neat/tidy' nuance

  • tight

    suggests little or no empty space between parts; often used for fits or seals

  • compressed

    implies external pressure was applied to make something compact

Antonyms
  • loose

    not firmly packed; with space between parts

  • spacious

    offering plenty of room; the opposite of space-efficient

Usage Note

Used both before a noun (a compact camera) and after a linking verb (the soil is compact). The meaning shifts slightly: before a noun it emphasises small size and efficient design; after a verb it emphasises density and firmness.

Common Mistakes

The writer's style is very compact.
The writer's style is very concise.
'compact' for 'brief/concise' writing exists but is rare; learners should use 'concise' for writing style.

compact — noun

compact — verb

Word family

  • compactly
    adverbB2
  • compactness
    nounC1
  • compaction
    nounC1
  • compacted
    adjectiveB2
  • compactor
    nounC1

Synonym discussion

Sense: adjective/1

All four words describe things that are closely packed, but they highlight different aspects. Compact emphasises both efficient use of space and neatness — a compact apartment is small but well arranged. Dense focuses purely on how many parts are packed into a given area, without any connotation of tidiness (dense forest, dense population). Tight suggests there is little or no room between parts, often with a sense of secure fit (tight seal, tight weave). Compressed implies that external force has been applied to reduce volume (compressed air, compressed data). In everyday use, compact is the best choice for describing a well-designed small object; dense is better for describing materials or populations; tight is better for describing fits or connections; and compressed is better when the reduction in size comes from pressure rather than design.

dense ↗tight ↗compressed ↗compact ↗

Common collocations

Nouns

Adverbs

Phrases

  • in compact form
  • of compact size

Prepositions

Etymology

LatinFrenchEnglish

Compact comes from the Latin verb 'compingere', which means 'to fasten together'. This was formed from 'com-' (together) and 'pangere' (to fix or drive in). The past participle 'compactus' gave rise to the English adjective and noun. The word entered English through French in the 14th–15th centuries. The verb sense 'to press together' appeared in the 1500s, and the noun meaning 'a formal agreement' — something that fastens parties together — emerged in the 1600s.