Noun

(en-noun)

The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.

# The direction of attention to a specific object.

# The act, process or product of reducing the volume of a liquid, as by evaporation.

# The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.

A field or course of study on which one focuses, especially as a student in a college or university.

The proportion of a substance in a whole.

* {{quote-magazine, year=2013, month=July-August, author= Philip J. Bushnell, magazine=(American Scientist)

, title= Solvents, Ethanol, Car Crashes & Tolerance , passage=Surprisingly, this analysis revealed that acute exposure to solvent vapors at concentrations below those associated with long-term effects appears to increase the risk of a fatal automobile accident. Furthermore, this increase in risk is comparable to the risk of death from leukemia after long-term exposure to benzene, another solvent, which has the well-known property of causing this type of cancer.}}

# (chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))

The matching game pelmanism.

Noun

That which affects one's welfare or happiness.

*

, title=(The Celebrity), chapter=2 , passage=We drove back to the office with some concern on my part at the prospect of so large a case. Sunning himself on the board steps, I saw for the first time Mr. Farquhar Fenelon Cooke. He was dressed out in broad gaiters and bright tweeds, like an English tourist, and his face might have belonged to Dagon, idol of the Philistines.}}

* {{quote-news, year=2011, date=April 10, author=Alistair Magowan, work=BBC Sport

, title= Aston Villa 1-0 Newcastle , passage=Although the encounter was bathed in sunshine, the match failed to reach boiling point but that will be of little concern to Gerard Houllier's team, who took a huge step forward before they face crucial matches against their relegation rivals.}}

The expression of solicitude, anxiety, or compassion toward a thing or person.

* {{quote-book, year=1907, author=

, title=The Dust of Conflict, chapter=22 citation , passage=Appleby

A business, firm or enterprise; a company.

* 2001 November 18, " What the Muslim World Is Watching," The New York Times (retrieved 26 July 2014):

Soon after he ascended the throne, an Arabic television joint venture between the BBC and a Saudi concern , Orbit Communications, foundered over the BBC's insistence on editorial independence.

(computing, programming) Any set of information that affects the code of a computer program.

* 2006 , Awais Rashid, ?Mehmet Aksit, Transactions on Aspect-Oriented Software Development II (page 148)

At the programming level, an aspect is a modular unit that implements a concern .