also: シーズン・オフ
Wasei-eigo from English 'season off'. Refers to the period outside the main active or peak season, especially in sports, tourism, or business.
wasei-eigo (Japanese-coined English), from season off
Even in the off-season, you can enjoy hiking at the ski resort.
Professional baseball players do voluntary training during the off-season.
This beach is currently off-season.
The ski resort enters its off-season in April.
The athlete used the off-season to train his body.