airodump-ng wlan0 scan result:

In the above image, what does "not associated" mean in client connected section?
airodump-ng wlan0 scan result:

In the above image, what does "not associated" mean in client connected section?
From airodump-ng documentation website, description for BSSID field:
MAC address of the access point. In the Client section, a BSSID of “(not associated)” means that the client is not associated with any AP. In this unassociated state, it is searching for an AP to connect with.