Question

What is mean by Winter under lock?

Answer 1

under lock and key. locked away safely: Her jewellery is securely under lock and key at the bank. If a person, especially a criminal, is under lock and key, they are being kept in a place from which they cannot escape, usually a prison.

Answer 2

Answer:

The expression “winter under lock,”means, that there is no change of weather.

The expression “Winter under lock” means, in space weather is chill always.