Definition of a hit in the Polish edition of Wikipedia:
"A hit, hit or hit (this last term comes from English, where it means the same thing and literally translates as a hit) - a popular song or song at a certain time. The term usually refers to light music, but often its meaning extends for Classical music and other art, for example, "movie hits" or "movies." Musical hits usually have a catchy melody and are repeatedly broadcast by radio stations, and achieve high sales, although there are timeless hits, whose popularity seems to not go away, this is basically a periodic phenomenon.
The popularity of hits usually disappears with time, and they themselves are forgotten. Then the song may appear on the market in a new version and arrangement, what we call a cover. The hits from past years are often released on composite albums, covering certain time intervals, e.g. "hits of the seventies". Typically, such publications define the musical style of a given period.
The bestseller is the equivalent of a hit on the book market. "
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