Definitions for "Climax vegetation"
(3) the final vegetation community and highest ecological development of a plant community that emerges after a series of successive vegetational stages. The climax community perpetuates itself indefinitely unless disturbed by outside forces.
The stabilized plant community on a particular site. The plant cover reproduces itself and does not change so long as the environment remains the same.
The vegetation that would exist in an area if growth had proceeded undisturbed for an extended period. This would be the "final" collection of plant types that presumably would remain forever, or until the stable conditions were somehow disturbed.