This is the 17172nd most frequent Korean word.
서머
"서머" is a Konglish term meaning "summer."
The word '서머' is used as a definition for the Korean word 여름, showing its contextual use as a loanword.
서머는 여름이라는 뜻이에요.
'Summer' means '여름' (summer) in Korean.
Here '서머' specifies the time of year, referring to the season summer.
서머에는 해변으로 여행을 가요.
During summer, I go traveling to the beach.
In this sentence, '서머' modifies '휴가' (vacation), specifying that it is during the summer season.