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
3: consisting of or causing a climax; "a peak experience" [syn:
n 1: the most extreme possible amount or value; "voltage peak"
2: the period of greatest prosperity or productivity [syn: flower
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
4: the uppermost part of a shape; "at the peak of the pyramid"
5: the top point of a mountain or hill; "the view from the peak
was magnificent"; "they clambered to the summit of
Monadnock" [syn: crown
6: a V shape; "the cannibal's teeth were filed to sharp points"
7: the highest point of something [syn: vertex
8: a brim that projects to the front to shade the eyes; "he
pulled down the bill of his cap and trudged ahead" [syn: bill
v : to reach the highest point; attain maximum intensity,
activity: "That wild, speculative spirit peaked in 1929."
[syn: reach a peak