Phrase guide

rounding error

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

The difference between the result of a calculation using exact arithmetic and finite-precision, rounded arithmetic.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: mathematics, sciences

Examples

  • The rocket's malfunction was down to a rounding error in the mathematics of its trajectory guidance.

Meaning relationships

Synonyms: roundoff error

Antonyms: none provided

2

noun

Meaning 2

A negligible fraction of something.

Definition source: English Wiktionary via Wiktextract

Usage: broadly, countable, uncountable

Examples

  • In the budget of the rocket forces, the 200 thousand dollars for the investigation was a mere rounding error.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

(mathematics) a miscalculation that results from rounding off numbers to a convenient number of decimals

Definition source: Princeton WordNet 3.0

Examples

  • the error in the calculation was attributable to rounding
  • taxes are rounded off to the nearest dollar but the rounding error is surprisingly small

Meaning relationships

Synonyms: rounding

Antonyms: none provided

Broader terms: miscalculation, misreckoning, misestimation

History

Etymology

No etymology was provided for this word.

Across languages

Translations

3 source translations are retained for this English entry.

  • German: Rundungsfehler — Translations
  • Italian: errore di calcolo — Translations
  • Spanish: error de redondeo — Translations