mean has 18 distinct synonyms spread across 13 of its 16 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
approximating the statistical norm or average or expected value
“the average income in New England is below that of the nation”
having or showing an ignoble lack of honor or morality
“that liberal obedience without which your army would be a base rabble”
(used of sums of money) so small in amount as to deserve contempt
an average of n numbers computed by adding some function of the numbers and dividing by some function of n
2 of the 16 recorded senses carry no synonym, antonym or related term, so they are not shown above. Every sense, with its definition and examples, is on the full entry for mean.
Synonyms, antonyms and the broader and narrower relations for mean come from Princeton University’s WordNet. Full sources and licences.
have as a logical consequence
“The water shortage means that we have to stop taking long showers”
destine or designate for a certain purpose
“These flowers were meant for you”