improper
adjective(im-prop-er)
not proper: such as
improper
adjective(im-prop-er)
not in accord with fact, truth, or right procedure : incorrect
improper
adjective(im-prop-er)
not regularly or normally formed or not properly so called
improper
noun(im-prop-er)
a fraction whose numerator is equal to, larger than, or of equal or higher degree than the denominator
improper
noun(im-prop-er)
a definite integral whose region of integration is unbounded or includes a point at which the integrand is undefined or tends to infinity