In mathematics, a basis or set of generators is a collection of objects that can be systematically combined to produce a larger collection of objects.

See:

• Basis (linear algebra)
• Basis (topology)
• Greedoid (basis as a maximal feasible set)

In economics or accounting, a basis is the cost or value of an asset as adjusted for tax purposes.

• In the video game "Halo", the only moon of Threshold, the planet around which the ringworld Halo orbits.