1 a bag filled with soft material, for example feathers, which you put on a chair, etc to make it more comfortable 软垫子；坐垫；椅垫 ☞A cushion on a bed is a pillow. 枕头叫做pillow。

2 something that acts or is shaped like a cushion 具有软垫功能的东西；垫状物: A hovercraft rides on a cushion of air. 气垫船在垫子般的空气上行驶。