Definition of "injection" []

• The act of injecting. (noun)
• Something that is injected, especially a dose of liquid medicine injected into the body. (noun)
• Mathematics A function that is one-to-one. (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.

• "The dermal filler injection is injected in the ball of the foot to ease the pain caused by wearing high heels."
• "The program, extended last week with a $2 billion cash injection, is bound to thin the herd."
• "Locog, sponsors and coalition politicians, desperate for the Games to succeed both on their own terms and as a mid-term injection of flag waving optimism against a gloomy economic backdrop, must walk an increasingly fine line between encouraging them to get on board and hectoring them to do so."