What is the meaning of the word "round"?

Definitions:

(mathematics) expressed to the nearest integer, ten, hundred, or thousand adjective
- in round numbers
a serving to each of a group, which is usually alcoholic noun
- They ordered a second round.
an outburst of applause noun
- there was a round of applause
express as a round number verb
- round off the amount
make round verb
- round the edges
often plural; a series of professional calls, usually in a set order noun
- The doctor goes on their rounds first thing every morning.
the activity of playing 18 holes of golf noun
- a round of golf takes about 4 hours
the course along which communications spread noun
- the story is going the rounds in Washington
the usual activities in your day noun
- The doctor made the rounds.
when a sound is full and rich adjective
- I find that vinyl records tend to make a much rounder sound than MP3's.