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 bottom-most part of a doorway that one crosses to enter; a sill.

(by extension) An entrance

The start of the landing area of a runway

(engineering) The quantitative point at which an action is triggered, especially a lower limit.

The wage or salary at which income tax becomes due

The outset of an action or project

The point where one mentally or physically is vulnerable in response to provocation or to particular things in general. As in emotions, stress, or pain.

The point of beginning or entry

From all the pressure my partner has been through lately, his emotion threshold has suddenly gotten pretty low these days. I can tell because he easily loses it when he is around people or hears about anything to do with his concerns.