(superlative of `good') having the most positive qualities(adj.all)
Example: The best film of the year.
The best solution.
The best time for planting.
Wore his best suit.
source: wordnet30
Having good qualities in the highest degree; most good, kind, desirable, suitable, etc.; most excellent; as, the best man; the best road; the best cloth; the best abilities.(adjective)