/pi:t ||; pit/noun [U] a soft black or brown natural substance that is formed from dead plants just under the surface of the ground in cool, wet places. It can be burned as a fuel or put on the garden to make plants grow better. 泥炭，泥煤（由腐烂植物在地表下湿冷处形成的天然物质，可用作燃料或肥料）