Noun
1. a transient variation in voltage or current
2. sports equipment consisting of a sharp point on the sole of a shoe worn by athletes;
"spikes provide greater traction"3. fruiting spike of a cereal plant especially corn
4. (botany) an indeterminate inflorescence bearing sessile flowers on an unbranched axis
5. a sharp rise followed by a sharp decline;
"the seismograph showed a sharp spike in response to the temblor"6. a sharp-pointed projection along the top of a fence or wall
7. a long sharp-pointed implement (wood or metal)
8. any holding device consisting of a long sharp-pointed object
9. a long metal nail