In that dream it feels different to him. That is when you know that you are no longer a child, you are one step closer to becoming an mature adult. Everyone in the community has stirrings so it's not a surprise to anyone, but to Jonas it is. People in the real world would call “Stirrings” puberty. Jonas’s community calls them “stirrings” because it is the language of Utopia, it is different. In other words, it’s what they are used to. It makes sense to them, they were born with it.
Another language that they use in the community is called a “New Child”. A “New Child” is just like a baby. It is a baby. Their community uses that word because of birth mothers. Birth Mothers have 3 children in a 3 year period and it’s called a new child. Mother’s and Father’s are not allowed to have their own children just simply because, what if they have twins. A new child stays in the “Nurturing Center” until it can find a family or it is big enough. Gabriel, is not too big enough to have a family yet so he has to stay in the nurturing center and be looked after by Jonas's