Any material used to cover the top layer of soil to protect, insulate, or decorate it, or to discourage weeds or retain moisture.
An organic mulch is a mulch made of natural substances such as leaves or grass clippings.
A material used as mulch, as a decorative redwood bark mulch.
To apply mulch.
Mulch your vegetable garden to retain moisture and keep weeds down.
To turn into mulch.
I decided to mulch the grass clippings.