Difference between frost and winter season in Korean
서리·겨울철

서리frost
서리 means frost, the thin layer of ice you see on grass, cars, or windows on cold mornings. People often use it when talking about winter weather outside. It usually appears when the air is very cold.

겨울철winter season
The word "겨울철" means the winter season, or the time of year when it is winter. People use it to talk about weather, clothes, health, food, and daily life in winter. You can think of it as "during winter" or "in the winter season" in many sentences.
The difference
frost (서리) and winter season (겨울철) are nearby Korean vocabulary items learners often meet together. Use “frost” when 서리 means frost, the thin layer of ice you see on grass, cars, or windows on cold mornings. People often use it when talking about winter… Use “winter season” when The word "겨울철" means the winter season, or the time of year when it is winter. People use it to talk about weather, clothes, health, food…