/mʌltʃ ||; mʌltʃ/noun [C,U] (technical术语) material, for example dead leaves, that you put around a plant to protect its base and its roots, to improve the quality of the soil or to stop WEEDS (= wild plants that are not wanted in the garden) from growing （为保护根部、改善土壤、遏制野草生长而放在植物四周的）覆盖物，覆盖料 mulch verb [T]