This is the 2293rd most frequent Japanese word.
馬場
"馬場" means "horse riding ground" or "horse riding arena."
Here, '馬場' refers to a 'riding ground' or 'place for horse riding'.
彼は馬場で乗馬を習っています。
He is learning horse riding at the riding ground.
In this case, '馬場' again refers to a 'riding ground', specifically one known in the local area.
近くの馬場には子供たちがたくさんいます。
There are many children at the nearby riding ground.
Here, '馬場' is used as a surname (Baba), illustrating its usage as a proper noun.