this season; the current season
Refers to the present season (spring, summer, autumn, winter) in a given context, often used in business or formal writing.
We introduce this season's new products.
Obsolete usage; in modern Japanese, 当今 (とうきん) or 最近 (さいきん) are used instead.
In old texts, とうき is sometimes used with the same meaning as とうこん (nowadays).