what is the meaning of spark?

spark
n.[C]
1.火花,火星
A cigarette spark started the fire.
香烟的火星引起这场火灾.
2.(宝石等的)闪耀
We saw a spark of light through the trees.
我们透过树丛看到闪光.
3.【电】火花;火星
Close the circuit and you'll see a blue spark.
接通电路你就会看到一个蓝色的电火花.
4.(常用于否定句)微量;丝毫[S][(+of)]
He showed not a spark of interest in the plan.
他对这个计划一点不感兴趣.
5.生气,活力;(才智等的)焕发
The spark of life still flickered in him.
他的生命之火还在闪烁.
6.迹象,痕迹
He still retains a spark of decency.
他仍然保持着一点起码的体面.
vt.
1.发动;点燃[(+off)]
They were scheming to spark a revolt.
他们策划发起反叛.
2.激励;鼓舞
It was this incident that sparked her interest in politics.
是这个事件激起了她对政治的兴趣.
vi.
1.发出火花;飞出火星
This wood burns steadily with no sparking.
这木柴长时间燃烧正常,不爆火花.
2.闪耀,闪光
Her eyes sparked.
她双眼闪闪发光.
3.热烈赞同
Her mother sparked to the idea of an early wedding date.
她母亲欣然同意早日举行婚礼的打算.