This is the 286th most frequent Korean word.
대형
"대형" means "large scale" or "large size" in English.
대형 here means 'large-scale' or 'large.' It modifies the noun 'building,' indicating its significant size.
대형 건물이 도시에 새로 건설되었습니다.
A large building has been newly constructed in the city.
대형 in this context implies 'major' or 'large-scale,' describing the extent of the discount event.
그 가게는 대형 할인 행사를 개최할 예정입니다.
The store is planning to hold a major discount event.
In this sentence, 대형 means 'large-sized,' modifying 'screen' to indicate its magnitude.