# In neural networks, what does the term depth generally mean?

Is it

1. number of units in a layer
2. number of layers
3. overall complexity of the network (both 1 and 2)
• Usually it refers to the number of layers that are sequential (i.e. one after the other). However, it isn't used much like a quantity (e.g. this network has a depth of 8), rather a qualitative characteristic of the network (e.g. this network is deeper than the other). Feb 18 '20 at 9:33