peak

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peak

1. the pointed summit of a mountain
2. a mountain with a pointed summit
3. 
a. a sharp increase in a physical quantity followed by a sharp decrease
b. the maximum value of this quantity
c. (as modifier): peak voltage
4. Nautical
a. the extreme forward (forepeak) or aft (afterpeak) part of the hull
b. (of a fore-and-aft quadrilateral sail) the after uppermost corner
c. the after end of a gaff
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

peak

[pēk]
(geology)
The conical or pointed top of a hill or mountain.
An individual mountain or hill taken as a whole, used especially when it is isolated or has a pointed, conspicuous summit.
(meteorology)
The point of intersection of the cold and warm fronts of a mature extra-tropical cyclone.
(science and technology)
The maximum instantaneous value of a quantity.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The annual influenza season began between November and December, peaked between January and February, and returned to baseline between April and June for the study period in every year at all reporting sites (Figure 1).
Shipments of aluminum castings peaked last year at 2 million tons and are expected to top that mark again in '00.