Not according to facts; inaccurate or erroneous
unsuitable to needs or circumstances; inappropriate; inapt
Not properly named; See, for example, improper fraction
Not in keeping with conventional mores or good manners; indecent or immodest
Not consistent with established facts; incorrect
Of a complex random variable, correlated with its conjugate
very wrong, not even close
remote; far; distant (in space)
remote; far in the future