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