2. (Math.) A quantity having an intermediate value between several
others, from which it is derived, and of which it expresses the
resultant value; usually, unless otherwise specified, it is the simple
average, formed by adding the quantities together and dividing by their
number, which is called an arithmetical mean. A geometrical mean is the
square root of the product of the quantities.
3. That through which, or by the help of which, an end is attained;
something tending to an object desired; intermediate agency or measure;
necessary condition or coagent; instrument.
Their virtuous conversation was a mean to work the conversion of
the heathen to Christ.
Hooker.
You may be able, by this mean, to review your own scientific
acquirements.
Coleridge.
Philosophical doubt is not an end, but a mean.
Sir W. Hamilton.
In this sense the word is usually employed in the plural form means,
and often with a singular attribute or predicate, as if a singular
noun.
By this means he had them more at vantage.
Bacon.
What other means is left unto us.
Shak.
4. pl. Hence: Resources; property, revenue, or the like, considered as
the condition of easy livelihood, or an instrumentality at command for
effecting any purpose; disposable force or substance.
Your means are very slender, and your waste is great.
Shak.
5. (Mus.) A part, whether alto or tenor, intermediate between the
soprano and base; a middle part. [Obs.]
The mean is drowned with your unruly base.
Shak.