"roundness" in the noun sense
1. roundness, rotundity
the fullness of a tone of voice
"there is a musky roundness to his wordiness"
2. roundness
the quality of being round numbers
"he gave us the results in round numbers, but their roundness didn't affect the point he was making"
3. roundness
the property possessed by a line or surface that is curved and not angular
4. plumpness, embonpoint, roundness
the bodily property of being well rounded
Source: WordNet® (An amazing lexical database of English)
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