성에 무슨 뜻이 인가요?
창문에 가득한 성에 때문에 바깥 풍경은 보이지 않았다
This phrase what means?
the 성에 is confuse for me
What means 성? I dont understand

if someone helps me I would appreciate it very much

Question

성에 무슨 뜻이 인가요?
창문에 가득한 성에 때문에 바깥 풍경은 보이지 않았다 
This phrase what means?
the 성에 is confuse for me 
What means 성? I dont understand

if someone helps me I would appreciate it very much

Answer

'성에' is just a word, not '성+에', meaning 'frost'.
 The translation should be like 
"Due to the heavy frost on windows, the scenery wasn't visible".