This is the 7900th most frequent Russian word.
квадратные
"Square" (adjective).
In this context, 'квадратные' is part of the expression 'квадратные метры,' which means square meters, a unit of area measurement.
Для проекта понадобятся квадратные метры ткани.
The project will require square meters of fabric.
Here, 'квадратные' modifies 'часы,' describing the clock's shape as square.
Она купила квадратные часы для своей комнаты.
She bought a square-shaped clock for her room.
The word 'квадратные' here describes the shape of the windows, indicating they are square.