1.
If you describe someone’s opinions or policies as ~, you mean that they are neither left-wing nor right-wing, and not at all extreme.
Consensus need not be weak, nor need it result in ~ policies.
ADJ
2.
If you describe something or someone as ~, you mean that they are ordinary or unexciting.
I actually don’t want to be a ~ person, married with a mortgage.
ADJ
3.
Middle-of-the-road music is pop music which a large number of people like because it is pleasant and does not sound extreme or unusual. The abbreviation MOR is also used.
I like cheerful, uplifting ~ pop.
ADJ