n. A long, thick, sharp-pointed piece of wood or metal.n. A heavy nail.n. A spikelike part or projection, as:n. A sharp-pointed projection along the top of a fence or wall.n. A thin, sharp-pointed vertical rod for impaling papers; a spindle.n. A thorn or spine.n. A tuft of hair waxed or twisted so as to project in a stiff point.n. Slang A hypodermic needle.n. One of several sharp metal projections set in the sole or in the sole and heel of an athletic shoe for grip.n. A pair of athletic shoes having such projections.n. A pair of spike heels.n. An unbranched antler of a young deer.n. A young mackerel of small size, usually 15 centimeters (6 inches) or less in length.n. A sharp rise followed by a sharp decline in a graph or in the tracing of a scientific instrument.n. A sharp momentary increase in voltage or electric current.n. A sudden steep increase in prices.n. Sports The act of driving a volleyball at a sharp angle into the opponent's court by jumping near the net and hitting the ball down hard from above.n. Football The act of slamming the ball to the ground after succeeding in an important play, as after scoring a touchdown.v. To secure or provide with a spike.v. To shape into spikes.v. To impale, pierce, or injure with a spike.v. To injure with spiked shoes, especially when sliding in baseball.v. To put an end to; terminate: spike a rumor. v. Informal To add alcoholic liquor to: spiked the punch with rum. v. Informal To add a poison or other chemical to: a drink spiked with barbituates. v. Informal To add flavor or spice to: "several herb vinegars, including one . . . spiked with colorful chive blossomsā ( New England Living). v. Informal To add excitement or vitality to: spiked the speech with many jokes. v. Sports To hit (a volleyball) in a spike.v. Football To throw (the ball) down in a spike.v. To render (a muzzleloading gun) useless by driving a spike into the vent.v. To manifest (a sharp increase in body temperature): spike a high fever. n. An ear of grain, as of wheat.n. Botany A usually elongated, unbranched inflorescence with stalkless flowers arranged along an axis.