Verb
make bigger or better or more complete
fill out
make round
express as a round number
Source: WordNetHe was too good a soldier to go around asking questions, trying to round out his knowledge. A soldier's knowledge wasn't supposed to be round. Kurt Vonnegut
As a boy, I'd always had an interest in theater. But the idea at my school was that drama and music were to round out the man. It wasn't what one did for a living. I got over that. Hugh Jackman
These studies round out the results of many years of research Source: Internet
round the edges Source: Internet
round off the amount Source: Internet
Aaron Baddeley (one under), two-time event winner Jason Day (one over), Matt Jones (three over), Cameron Davis and John Senden (both four over) round out the Australian contingent. Source: Internet