Static

1. Unchanging; that cannot or does not change.

Synonym: stable

Antonym: dynamic

2. Immobile; fixed in place; having no motion.

Synonyms: stable, still

Antonyms: dynamic, kinetic, mobile, moving

3. (programming) Computed, created or allocated before the program starts running, and usually not changeable at runtime

Antonyms: dynamic, nonstatic

4. (object-oriented programming) Defined for the class itself, as opposed to instances of it; thus shared between all instances and accessible even without an instance.