mean vs harmonic mean

mean and harmonic mean both are nouns.

As nouns, harmonic mean is a hyponym of mean; that is, harmonic mean is a word with a more specific, narrower meaning than mean:

mean: an average of n numbers computed by adding some function of the numbers and dividing by some function of n
harmonic mean: the mean of n numbers expressed as the reciprocal of the arithmetic mean of the reciprocals of the numbers

Other hyponyms of mean include expectation, expected value, arithmetic mean, first moment, geometric mean, Winsorized mean, weighted arithmetic mean, weighted average, weighted mean.

mean (noun)	harmonic mean (noun)
an average of n numbers computed by adding some function of the numbers and dividing by some function of n	the mean of n numbers expressed as the reciprocal of the arithmetic mean of the reciprocals of the numbers

mean (adjective)	harmonic mean (adjective)
approximating the statistical norm or average or expected value
characterized by malice
having or showing an ignoble lack of honor or morality
marked by poverty befitting a beggar
(used of persons or behavior) characterized by or indicative of lack of generosity
(used of sums of money) so small in amount as to deserve contempt
of no value or worth
very good; of the highest quality

mean (verb)	harmonic mean (verb)
mean or intend to express or convey
have as a logical consequence
denote or connote
have in mind as a purpose
have a specified degree of importance
intend to refer to
destine or designate for a certain purpose