geometric mean see under mean³

mean³ /mēn/

1. Intermediate
2. Average
3. Moderate (obsolete)

1. That which is between or intermediate
2. An average amount or value
3. A middle state or position
4. An intermediate term in a progression
5. Meantime (Spenser)
6. A middle or intermediate part (music; obsolete)
7. An instrument or medium
8. A mediator or intercessor (obsolete)

means singular noun or plural noun

1. That by whose instrumentality anything is caused or made to happen
2. A way to an end
3. (as pl) pecuniary resources
4. (as pl) what is required for comfortable living

meanˈtime or meanˈwhile noun

The intervening time

1. In the intervening time
2. At the same time

mean free path noun

The average distance travelled by a molecule, atom, etc, between collisions

mean lethal dose noun (radiology)

The single dose of whole body irradiation which will cause death, within a certain period, to 50% of those receiving it (abbrev MLD)

mean sea level see sea level under sea

means test noun

The test of private resources, determining or limiting a claim to a concession or allowance

meansˈ-test transitive verb

mean sun noun

An imaginary sun moving uniformly in the equator, its position giving mean time or mean solar time (coinciding with true sun time four times a year)

meanˈ-tone noun (music)

An interval of mean value between a major and a minor second, formerly used in a system of temperament

a means to an end

A method designed solely to achieve a goal, without regard for the value of the method itself

arithmetic (or arithmetical) mean

The sum of a number of quantities divided by their number

by all means

Certainly

by any means

In any way

by means (Spenser)

Because

by means of

With the help or use of

by no means or not by any means

Certainly not

geometric (or geometrical) mean

The nth root of the product of n quantities

golden mean

1. The middle course between two extremes
2. A wise moderation

harmonic mean

The reciprocal of the arithmetical mean of the reciprocals of two quantities

in the mean (Spenser)

In the meantime

quadratic mean

The square root of the arithmetical mean of the squares of the given quantities