after conversion,
we are no longer sinners according to the 'Biblical definition' -
it's not to say that we no longer sin, but we do not 'practice sin',
else we would crucify The Son of God afresh, and put Him to an open shame'...
the definition of 'sinner' is, 'not free from sin' -
ROMANS 6:18. Being then made free from sin, you became the servants of righteousness.