Tightness may refer to:
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Look up tightness in Wiktionary, the free dictionary.
In mathematics,
- Tightness of (a collection of) measures is a concept in measure (and probability), theory in mathematics
- Tightness (topology) is also a cardinal function used in general topology
In economics,
- Tightness refers to the degree to which the number of unemployed workers exceed the number of posted job vacancies (or vice versa).
- Market tightness, a point in time where it is very difficult to invest, but it is far easier to sell or to remove investments in return of monetary rewards
In other fields,
- Tightness of a rope indicates the rope is under tension
- Tightness of a sealing means it is impermeable, that it seals well
- Tightness is the art of being 'tight' (i.e., stingy or miserly)
- Tightness can refer to something being cool