peak
     adj 1: of a period of maximal use or demand or activity; "at peak
            hours the streets traffic is unbelievable" [ant: {off-peak}]
     2: approaching or constituting a maximum; "maximal
        temperature"; "maximum speed"; "working at peak
        efficiency" [syn: {highest}, {peak(a)}]
     n 1: the most extreme possible amount or value; "voltage peak"
          [syn: {extremum}]
     2: the period of greatest prosperity or productivity [syn: {flower},
         {prime}, {heyday}, {bloom}, {blossom}, {efflorescence}, {flush}]
     3: the highest level or degree attainable; "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" [syn: {acme}, {height}, {elevation},
         {pinnacle}, {summit}, {superlative}, {top}]
     4: the top point of a mountain or hill; "the view from the peak
        was magnificent"; "they clambered to the summit of
        Monadnock" [syn: {crown}, {crest}, {top}, {tip}, {summit}]
     5: a V shape; "the cannibal's teeth were filed to sharp points"
        [syn: {point}, {tip}]
     6: the highest point (of something); "at the peak of the
        pyramid" [syn: {vertex}, {apex}, {acme}]
     7: a brim that projects to the front to shade the eyes; "he
        pulled down the bill of his cap and trudged ahead" [syn: {bill},
         {eyeshade}, {visor}, {vizor}]
     v : to reach the highest point; attain maximum intensity,
         activity; "That wild, speculative spirit peaked in 1929"
Source: WordNet® 2.0