Wiktionary
rounding out
vb. (present participle of round out English)
Usage examples of "rounding out".
About as likely as rounding out a busted flush on a one card draw.
Instead he just found himself grinning at the man, thinking that his belly had done a bit of rounding out in the last few years.
There's an extraordinary rounding out of this particular individual.
The Australian threw in a theatrical toss of his head, rounding out his portrait.
Suzette replied, rounding out her vowels with a crisp East Residence tone.