a large board for displaying the score of a contest (and some other information)
"The crowd cheered loudly as their team's name flashed in bright lights on the stadium scoreboard."
A large board that displays the score in a game or contest.
"The crowd cheered loudly when their team's name appeared on the scoreboard."
In plain English: A scoreboard is an electronic display that shows how many points each team has during a game.
"The children gathered around the scoreboard to see which team was winning."
Usage: A scoreboard specifically refers to the physical display showing points during sports events, distinct from metaphorical uses of tracking progress. It is often confused with a leader's chart when discussing non-athletic competitions where scores are not immediately tallied on an electronic board.
The word scoreboard is a straightforward combination of the words score and board. It was formed to describe a panel used for displaying game scores.