residual

residual — adjective

1. describing a small amount or effect that is left after the main part has been re

1.adjectiveB2
Definition

describing a small amount or effect that is left after the main part has been removed, used, or finished

Example

After cleaning the oven, a residual layer of grease was still visible around the edges.

attributive use: residual + noun (layer / heat / glue)

The residual heat from the engine kept the cabin warm for another hour.

Common collocations
  • residual effect
  • residual value
  • residual heat
  • residual risk
  • residual amount
Synonyms
  • remaining

    more general and common; suitable for everyday speech

  • leftover

    informal; typically used for physical items such as food or materials

  • outstanding

    used for work, debts, or issues that have not yet been dealt with

Antonyms
  • main

    refers to the primary or largest part, as opposed to what remains

  • consumed

    describes something that has been fully used up, leaving nothing behind

Grammar Patterns

residual + noun

Usage Note

Common in technical and formal contexts — science reports, legal documents, and financial statements. The everyday alternatives 'leftover' or 'remaining' are more natural in casual speech.

Common Mistakes

There was a residual glue on the table.
There was some residual glue on the table.
'residual' is an adjective, not a noun; it must modify a noun like 'glue', 'amount', or 'effect'.
The glue was residual.
The residual glue was difficult to remove.
'residual' is rarely used alone after the verb 'to be'; it sounds unnatural. Use 'leftover' or 'remaining' for that position instead.

residual — noun

Word family

  • residue
    nounB2
  • residually
    adverbC1
  • residuary
    adjectiveC2

Synonym discussion

Sense: adjective/1

All four words describe something that continues to exist after a process, but they differ in register and scope. 'Remaining' is the most neutral and widely used — it fits any context, from food ('the remaining pizza') to abstract quantities ('the remaining funds'). 'Residual' is more formal and often carries a technical or scientific tone; it frequently describes effects, chemicals, or small amounts that persist ('residual stress', 'residual heat'). 'Leftover' is informal and strongly associated with physical items, especially food ('leftover chicken'), though it can extend to materials ('leftover paint'). 'Outstanding' is narrower: it refers to work, payments, or problems that have not yet been resolved ('outstanding debts', 'outstanding tasks'). For a learner, 'remaining' is the safest everyday choice, while 'residual' adds precision in formal or technical writing.

remaining ↗leftover ↗outstanding ↗

Common collocations

Nouns

Adverbs

  • still residual
  • merely residual
  • barely residual

Phrases

  • residual effect of something
  • residual value of an asset
  • residual risk in a process
  • residual income after expenses

Prepositions

  • residual from
  • residual after
  • residual in
  • residual of

Etymology

LatinFrenchEnglish

The word 'residual' comes from the Latin 'residuum', meaning 'something left behind'. This noun was formed from 'residēre' — 'to remain behind' — which breaks down into 're-' ('back') and 'sedēre' ('to sit'). English borrowed 'residue' directly from French in the 14th century, and by the 16th century, 'residual' emerged as its adjective form. The entertainment-industry sense (payments for reruns) dates from the mid-20th century, reflecting the rise of television and syndication.