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English definition of “spike”

spike

noun [C] (POINT)   /spɑɪk/
a long metal nail used to hold something in place, or a shape that is long and narrow and comes to a point at one end: railroad spikes Spikes are also pointed pieces of metal fixed on the bottom of special shoes, used in some sports to catch in the ground and prevent falling or sliding, or the shoes themselves. A spike is also a sudden increase, often shown on a graph (= type of drawing) by a long, narrow shape that comes to a point at the top: The upward spike in prices was attributed to bad weather in farm areas.
(Definition of spike noun (POINT) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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