Waste land is land, especially in or near a city, that is not used or taken care of by anyone, and so is covered by wild plants and rubbish.

A waste of something such as time, money, or energy is when you use too much of it doing something that is not important or necessary, or is unlikely to succeed.

Waste is the use of money or other resources on things that do not need it.

Waste is material that has been used and is no longer wanted, for example, because the valuable or useful part of it has been taken out.

If someone wastes away, they become extremely thin or weak because they are ill or worried and they are not eating properly.

If something goes to waste, it remains unused or has to be thrown away.

If you waste something such as time, money, or energy, you use too much of it doing something that is not important or necessary, or is unlikely to succeed.

If you waste an opportunity for something, you do not take advantage of it when it is available.