1. at the time of a year when sth. is plentiful盛產季節;旺季;正當時令
Fruit is cheapest in season. 水果旺季時,價格最便宜。
Native watermelons will be in season soon. 地產西瓜就要上市了。
2. at the right time恰好的時候
I arrived in season for the examination. 我及時趕上考試。
He spoke a word in season to me. 他及時地勸導了我。