1 : having or showing an ignoble lack of honor or morality; "that liberal obedience without which your army would be a base rabble"- Edmund Burke; "taking a mean advantage"; "chok'd with ambition of the meaner sort"- Shakespeare; "something essentially vulgar and meanspirited in politics"
1 : mean or intend to express or convey
2 : make known; make an announcement
3 : have as a meaning
4 : take the place of or be parallel or equivalent to
5 : be a sign or indication of
1 : an average of n numbers computed by adding some function of the numbers and dividing by some function of n