It's a one sided conversation where the child is used by the adult as an object to vent at, to expel internal feelings or thoughts. The child's identity or emotional self isn't acknowledged or validated in a conversation that uses lecture form. Excessively talking, interrupting, and competing for conversation are also a types of emotional neglect or abandonment. A child never really gets heard in these kinds of interaction because the talker is thinking about what to say next instead of listening. They are preoccupied with themselves and controlling the conversation instead of listening to what's being said by the child.
Silence is another way to emotionally neglect or abandon a child.
In MY opinion, this one is the worst. By not sharing anything intimate or vulnerable with the child, or not sharing information that the child needs to grow and develop, the child is emotionally and intellectually alone without a means to get the information they need to grow and develop. Silence is another way of controlling. Information is power and when an abuser holds onto information, the child is left feeling vulnerable. The child will never know a sense of comfort by knowing that the caretaker has also felt vulnerable at times or has felt vulnerable as a child.