actually...No. "a secret plan by a group to do something unlawful or harmful."
You also have to know how to use the dictionary. You don't just pick the meaning you like, and then pretend all the other ones don't exist.
1. the act of conspiring.
2. an evil, unlawful, treacherous, or surreptitious plan formulated in secret by two or more persons; plot.
3. a combination of persons for a secret, unlawful, or evil purpose:
4. Law. an agreement by two or more persons to commit a crime, fraud, or other wrongful act.
5. any concurrence in action; combination in bringing about a given result.
You really need to learn what these words mean before using them.