Make (something) look more attractive by adding extra items or images to it.
Paintings decorated the walls.
They decided to decorate the room with vibrant colors and modern furniture.
The children eagerly helped decorate the house for Halloween, putting up spooky decorations.
The couple spent the weekend decorating their new home, making it feel warm and inviting.
The event planner hired a team of professionals to decorate the venue for the grand celebration.