2 : characterized by malice; "a hateful thing to do"; "in a mean mood"
3 : (used of sums of money) so small in amount as to deserve contempt
4 : of no value or worth; "I was caught in the bastardly traffic"
5 : approximating the statistical norm or average or expected value; "the average income in New England is below that of the nation"; "of average height for his age"; "the mean annual rainfall"