The definition of optimum is the best.
Most satisfactory, suitable, or useful; most desirable:
The definition of superlative is expressing the very highest degree, or the very best example of something.
Healthier or more fit than before:
Find another word for optimal. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for optimal, like: optimum, best, superlative, better, optimise, optimally, adaptive, effective, steady-state, improved and adequate.