Disposable means designed to be thrown away after one use or a short period of use. Paper plates, plastic forks, and tissues are all disposable items. You use them once, then toss them in the trash.

Disposable products became popular because they're convenient. Instead of washing dishes after a picnic, you can use disposable plates and cups. Hospitals rely heavily on disposable gloves and masks because throwing them away after each patient prevents the spread of germs far better than trying to clean and reuse them.

The convenience comes with a cost, though. Mountains of disposable products pile up in landfills, and many take hundreds of years to break down. A disposable water bottle you use for ten minutes might sit in a landfill for centuries. Scientists and engineers now work on creating disposable items that break down faster or finding ways to use fewer of them without sacrificing safety or hygiene.

The word can also describe something treated as unimportant or easily replaced. If someone calls workers disposable, they mean those workers are viewed as replaceable rather than valued. This usage carries a harsh, critical tone, suggesting people are being treated like paper cups instead of like human beings who matter.