Gardeners use the word manure to mean a fertilizer made from animal waste. Manure is good for helping plants grow and stay healthy.
When you spread manure on your vegetable garden, you're feeding the soil and plants with nutrients that encourage growth. The manure itself might be, for example, a combination of cow dung and straw, or slightly decomposed chicken waste. Sometimes the word manure is used for any kind of fertilizer, including those made entirely from plants. The earliest meaning of manure was "to cultivate land," from an Old French root word, manouvrer, "to work with the hands or cultivate."