What does EFFECTIVE mean?

adjective

1. producing or capable of producing an intended result or having a striking effect“an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation”
2. able to accomplish a purpose; functioning effectively“people who will do nothing unless they get something out of it for themselves are often highly effective persons...”
3. works well as a means or remedy“an effective reprimand”
4. exerting force or influence“the law is effective immediately”
5. existing in fact; not theoretical; real“a decline in the effective demand”
6. ready for service“the fort was held by about 100 effective soldiers”