Definitions
1.nounA curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point.
2.nounA helix.
3.nounA self-sustaining process with a lot of momentum involved, so it is difficult to accelerate or stop it at once.
4.verbTo move along the path of a spiral or helix."The falling leaves spiralled down from the tree."
5.verbTo cause something to spiral."You need to learn how to spiral a ball."
6.verbTo increase continually."Her debts were spiralling out of control."
7.adjectiveHelical, like a spiral