Generally means “in general,” or “loosely.” If something is generally true, it is usually true. If you generally dislike birthday celebrations, don’t be mad when no one throws you a party.
If something is right generally, then it's right most of the time, though perhaps not in every case. Generally, dogs are more playful than cats. Generally, young people are healthier than old people. Generally, people like music. This word is handy when you need to say something that is true for most, but not all, people or things. This word helps you to generalize.