What is Normal?

Is normal 98.6 degrees?...Is normal the sunshining?...When you can function at a minimin level? So what is normal?

2 a : according with, constituting, or not deviating from a norm,
rule, or principle b : conforming to a type, standard, or regular
pattern

3 : occurring naturally 4 a : of, relating to,
or characterized by average intelligence or development b : free from
mental disorder : SANE

So being normal is therefore being sane? Why do we have to define what sane or normal is. Why does everyone judge us on what we do and say as being acceptable or unacceptable? And does that make the norm average?