#1 spike n. a transient variation in voltage or current. wn
#2 spike n. sports equipment consisting of a sharp point on the sole of a shoe worn by athletes; "spikes provide greater traction". wn
#3 spike v. stand in the way of. wn
#4 spike v. [transfix, impale, empale] pierce with a sharp stake or point; "impale a shrimp on a skewer". wn
#5 spike n. [ear, capitulum] fruiting spike of a cereal plant especially corn. wn
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