to the greatest degree or extent or most advanced stage (`furthest' is used more often than `farthest' in this abstract sense); "went the furthest of all the children in her education"; "furthest removed from reality"; "she goes farthest in helping us"
the highest level or degree attainable; the highest stage of development; "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"
strictly limiting the reference of a modified word or phrase; "the restrictive clause in `Each made a list of the books that had influenced him' limits the books on the list to only those particular ones defined by the clause"