Standard Lemma guide

roundness

noun · 6 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

No pronunciation record was provided for this word.

1

noun

Meaning 1

The quality or degree of being round.

The degree of accuracy to which a manufactured object intended to be round fulfills that requirement; it is measured by parameters such as TIR (total indicator reading).

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: business, engineering, manufacturing, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The quality or degree of being round.

Synonym of rotundity.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: rotundity

Antonyms: none provided

3

noun

Meaning 3

the bodily property of being well rounded

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: plumpness, embonpoint

Antonyms: none provided

Broader terms: fleshiness, obesity, corpulency

Narrower terms: chubbiness, pudginess, tubbiness, rolypoliness, buxomness

4

noun

Meaning 4

the property possessed by a line or surface that is curved and not angular

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: angularity

Broader terms: shape, form, configuration, contour, conformation

Narrower terms: sphericity, sphericalness, globosity, globularness, rotundity, rotundness, cylindricality, cylindricalness, circularity, disk shape

5

noun

Meaning 5

the quality of being round numbers

Definition source: Princeton WordNet 3.0

Examples

  • he gave us the results in round numbers, but their roundness didn't affect the point he was making

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: number, figure

6

noun

Meaning 6

the fullness of a tone of voice

Definition source: Princeton WordNet 3.0

Examples

  • there is a musky roundness to his wordiness

Meaning relationships

Synonyms: rotundity

Antonyms: none provided

Broader terms: tone, tone of voice

History

Etymology

From Middle English roundnesse, equivalent to round + -ness.