noun
kinboshi (win over an ozeki by a rank-and-file wrestler)
Sumo term: a victory by a maegashira (rank-and-file wrestler) over an ozeki. The term is often used metaphorically for a major upset or a big win against a superior opponent.
See also: 金星
平幕の力士が大関を破り、銀星を獲得した。
A maegashira wrestler defeated an ozeki and earned a kinboshi.
noun
silver star
Literal meaning: a star made of silver or a silver-colored star shape. Not a common standalone word; usually encountered in names, awards, or descriptive contexts.
その勲章には銀星が描かれている。
The medal has a silver star on it.