A weight (also known as mass) is an object, normally with high density, whose chief task is to have mass and exert weight (through gravity). It is used for different purposes, such as in:
- Anchor
- Balance weight
- Ballast
- Bob
- Counterweight
- Fishing sinker
- Paperweight
- Plumb bob
- Tuned mass damper
- Weight training equipment
![weight is hanging by steel wire](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Zuggewichte%2C_Oberleitungsmast_an_Eisenbahnlinie.jpg/220px-Zuggewichte%2C_Oberleitungsmast_an_Eisenbahnlinie.jpg)