Refers to a child with no siblings. Neutral term; can be used for children or adults describing their family background.
She is an only child and has no siblings.
It is said that only children tend to be spoiled.
Since he grew up as an only child, he doesn't know how to deal with siblings.
We're both only children, so we really understand how hard it can be.
Uses 独, which emphasizes 'alone'; less common than 一人っ子.