Definition of "jam" []

• To drive or wedge forcibly into a tight position: jammed the cork in the bottle. (verb-transitive)
• To activate or apply (a brake) suddenly. Often used with on: jammed the brakes on. (verb-transitive)
• To cause (moving parts, for example) to lock into an unworkable position: jammed the typewriter keys. (verb-transitive)
• To pack (items, for example) to excess; cram: jammed my clothes into the suitcase. (verb-transitive)
• To fill (a container or space) to overflowing: I jammed the suitcase with clothes. Fans jammed the hallway after the concert. (verb-transitive)

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 term jam-eating comes from when people worked in the mines."
• "With the term jam band incorporating everything from blues to bluegrass these days, it's an overused handle that barely describes all the disparate bands lumped within its parameters."
• "NOW, to celebrate this release, the SMD boys, some of their musical friends, and our pals at Modular UK are throwing a party TONIGHT in London - SMD will be there along with the Klaxons, Mystery Jets, Good Books, and the Modular and Ten Dead Sloanes DJ crews - the jam is at Sin (144 Charing Cross Road - WC2H 0LB) and costs six pounds in advance or eight with your student union card."