栏 (lán): railing, column

The wooden fence around the horse ranch was too low; the black horse leaped over it with a light jump and ran onto the grass outside.

The newly built monkey hill at the zoo is surrounded by a tall iron fence; visitors can only stand outside the fence to watch and cannot reach in to feed the animals.

The workers are installing stainless steel railings on the balcony; this way, when the child at home plays on the balcony, the adults won't have to worry about him falling off.

Several white barrier gates have been newly installed at the entrance of the residential community; vehicles need to swipe a card to enter and exit, so outside vehicles can no longer drive in freely.