white circle; white star
Literal meaning: a white circle or star shape. Used in contexts like symbols, marks, or ratings.
地図上で白星は観光スポットを示している。
On the map, white stars indicate tourist spots.
victory mark; win
Sumo term: a white circle used to mark a win on the banzuke or scoreboard. By extension, any victory or win in sports or competition.
今場所は白星が先行している。
He has more wins than losses this tournament.
チームは開幕から白星を重ねている。
The team has been piling up wins since the season opener.
The rookie sumo wrestler scored his first win.
The team piled up wins and drew closer to the championship.
He marked his debut match with a victory.