Noun

(en noun)

An opening in anything made by breaking or parting.

An opening allowing passage or entrance.

An opening that implies a breach or defect.

A vacant space or time.

A hiatus.

* {{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= The machine of a new soul , passage=The yawning gap in neuroscientists’ understanding of their topic is in the intermediate scale of the brain’s anatomy. Science has a passable knowledge of how individual nerve cells, known as neurons, work. It also knows which visible lobes and ganglia of the brain do what. But how the neurons are organised in these lobes and ganglia remains obscure. Yet this is the level of organisation that does the actual thinking—and is, presumably, the seat of consciousness.}}

A mountain or hill pass.

(label) A sheltered area of coast between two cliffs (mostly restricted to place names).

(label) The regions between the outfielders.

The shortfall between the amount the medical insurer will pay to the service provider and the scheduled fee for the item.

* 2008 , Eileen Willis, Louise Reynolds, Helen Keleher, Understanding the Australian Health Care System , page 5,

Under bulk billing the patient does not pay a gap , and the medical practitioner receives 85% of the scheduled fee.

* {{quote-news, year=2012, date=May 13, author=Andrew Benson, work=BBC Sport

, title= Williams's Pastor Maldonado takes landmark Spanish Grand Prix win , passage=That left Maldonado with a 6.2-second lead. Alonso closed in throughout their third stints, getting the gap down to 4.2secs before Maldonado stopped for the final time on lap 41.}}

* {{quote-book, year=1995, author=Robert E. Knoll, chapter=A University on the Defensive 1920-1927

, title= Prairie University: A History of the University of Nebraska, page=70 , passage=When Charles Bessey suddenly died in 1916 at age seventy, he left a gap that was impossible to fill; and though his protégé. R. J. Pool, was a man of intelligence and character, he did not have Bessey’s authority.}}

(label) (usually written as "the gap") The disparity between the indigenous and non-indigenous communities with regard to life expectancy, education, health, etc.

Noun

(en-noun)

The nature of the surrounding environment, e.g. solid, liquid, gas, vacuum, or a specific substance such as a solvent.

The material or empty space through which signals, waves or forces pass.

* Francis Bacon

Whether any other liquors, being made mediums , cause a diversity of sound from water, it may be tried.

* Denham

I must bring together / All these extremes; and must remove all mediums .

(senseid) A format for communicating or presenting information.

The materials used to finish a workpiece using a mass finishing or abrasive blasting process.

A nutrient solution for the growth of cells ''in vitro .

* 1996 , Samuel Baron (editor), Medical Microbiology :

In some instances one can take advantage of differential carbohydrate fermentation capabilities of microorganisms by incorporating one or more carbohydrates in the medium' along with a suitable pH indicator. Such '''media''' are called differential ' media (e.g., eosin methylene blue or MacConkey agar) and are commonly used to isolate enteric bacilli.

The means or channel by which an aim is achieved.

A liquid base which carries pigment in paint.

A tool used for painting or drawing.

Acrylics, oils, charcoal and gouache are all mediums I used in my painting.

Someone who supposedly conveys information from the spirit world.

Anything having a measurement intermediate between extremes, such as a garment or container.

A person whom garments or apparel of intermediate size fit.

A half-pint serving of Guinness (or other stout in some regions).

A middle place or degree.

a happy medium

* L'Estrange

The just medium lies between pride and abjection.

(dated) An average; sometimes the mathematical mean.

* Burke

a medium of six years of war, and six years of peace

(logic) The mean or middle term of a syllogism, that by which the extremes are brought into connection.