English definition of “season”
/ˈsiːzən/ noun [C]
PART OF YEAR › one of the four periods of the year; winter, spring, summer, or autumn
SPECIAL TIME › a period of the year when a particular thing happens: [usually singular] the holiday season the rainy/dry season the football season
in season › If vegetables or fruit are in season, they are available and ready to eat. › If a female animal is in season, she is ready to mate.
out of season › If vegetables or fruit are out of season, they are not usually available at that time. › If you go somewhere out of season, you go during a period of the year when few people are there.