Type cast? (10)
I believe the answer is:
stereotype
This might be a double definition.
'type' is the first definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'cast?' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for stereotype that I've seen before include "cast" , "Sort of plate" , "received idea?" , "Set form" , "model" .)