a sort of very large nail; also, a piece of pointed iron set with points upward or outward.-anything resembling such a nail in shape.-an ear of corn or grain.-a kind of flower cluster in which sessile flowers are arranged on an unbranched elongated axis.-to fasten with spikes, or long, large nails; as, to spike down planks.-to set or furnish with spikes.-to fix on a spike.-to stop the vent of (a gun or cannon) by driving a spike nail, or the like into it.-spike lavender. see lavender.