What is the meaning of superlative?

noun

• An exaggerated expression (usually of praise. )
  • usage: "the critics lavished superlatives on it"
• The highest level or degree attainable; the highest stage of development.
  • usage: "his landscapes were deemed the acme of beauty"; "the artist's gifts are at their acme"; "at the height of her career"; "the peak of perfection"; "summer was at its peak"; "... Catapulted Einstein to the pinnacle of fame"; "the summit of his ambition"; "so many highest superlatives achieved by man"; "at the top of his profession"
  • synonyms: acme, height, elevation, peak, pinnacle, summit, meridian, tiptop, top
• The superlative form of an adjective or adverb.
  • usage: "`fastest' is the superlative of the adjective `fast'"; "`least famous' is the superlative degree of the adjective `famous'"; "`most surely' is the superlative of the adverb `surely'"
  • synonyms: superlative degree

adjective

• Highest in quality.
  • synonyms: greatest, sterling