Definition of "concentration" []

• The act or process of concentrating, especially the fixing of close, undivided attention. (noun)
• The condition of being concentrated. (noun)
• Something that has been concentrated. (noun)
• Chemistry The amount of a specified substance in a unit amount of another substance. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Rep. Paul's used of the term "concentration camp" to refer to the Hamas run Gaza Strip was a loaded phrase fraught with bitter memory in Jewish history."
• "I would prefer the term concentration camp — just as I would prefer that term be used for the concentration camps built and staffed (but not filled) under Title II of the McCarran Act (Red Scare Right Wing Reactionary time)."
• "The difference in concentration is restored by sodium being transported out once again."