jamfill too tightly; cram; fruit preserveNot to be confused with:jamb ? vertical sides of a doorway or windowAbused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embreejam 1 (j?m)v. jammed, jam·ming, jams v.tr.1. To drive or wedge forcibly into a tight position: jammed the cork in the bottle.2. To activate or apply (a brake) suddenly. Often used with on: jammed the brakes on.3. a. To cause to become unworkable because a part is stuck: The wrinkled paper jammed the copying machine.b. To cause (moving parts, for example) to lock into an unworkable position: jammed the typewriter keys.4. a. To pack (items, for example) to excess; cram: jammed my clothes into the suitcase.b. To fill (a container or space) to overflowing: I jammed the suitcase with clothes. Fans jammed the hallway after the concert.5. To block, congest, or clog: a drain that was jammed by debris.6. To crush or bruise: jam a finger.7. Electronics To interfere with or prevent the clear reception of (broadcast signals) by electronic means.8. Baseball To throw an inside pitch to (a batter), especially to prevent the batter from hitting the ball with the thicker part of the bat.v.intr.1. To become wedged or stuck: The coin jammed in the slot.2. To become locked or stuck in an unworkable position: The computer keyboard jammed.3. To force one’s way into or through a limited space: We all jammed into the elevator.4. Music To participate in a jam session.5. Basketball To make a dunk shot.n.1. The act of jamming or the condition of being jammed.2. A crush or congestion of people or things in a limited space: a traffic jam.3. A trying situation. See Synonyms at predicament.4. See jam session.[Origin unknown.]jam?ma·ble adj.jam?mer n.jam 2 (j?m)n. A preserve made from whole fruit boiled to a pulp with sugar.[Possibly from jam.]jam?my adj.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.jam (d?æm) vb, jams, jamming or jammed1. (tr) to cram or wedge into or against something: to jam paper into an incinerator. 2. (tr) to crowd or pack: cars jammed the roads. 3. to make or become stuck or locked: the switch has jammed. 4. (often foll by: on) to activate suddenly (esp in the phrase jam on the brakes)5. (tr) to block; congest: to jam the drain with rubbish. 6. (tr) to crush, bruise, or squeeze; smash7. (Electronics) radio to prevent the clear reception of (radio communications or radar signals) by transmitting other signals on the same frequency8. (Jazz) (intr) slang to play in a jam sessionn9. a crowd or congestion in a confined space: a traffic jam. 10. the act of jamming or the state of being jammed11. informal a difficult situation; predicament: to help a friend out of a jam. 12. (Jazz) See jam session[C18: probably of imitative origin; compare champ1] ?jammer njam (d?æm) n1. (Cookery) a preserve containing fruit, which has been boiled with sugar until the mixture sets2. slang something desirable: you want jam on it. 3. jam today the principle of living for the moment[C18: perhaps from jam1 (the act of squeezing)]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014jam1 (d?æm) v. jammed, jam?ming, n. v.t. 1. to press or squeeze into a confined space: to jam socks into a drawer. 2. to bruise or crush by squeezing: to jam one’s hand in a door. 3. to fill tightly. 4. to push or thrust violently on or against something: Jam your foot on the brake. 5. to block up by crowding: Crowds jammed the doors. 6. to put or place in position with a violent gesture (often fol. by on): He jammed on his hat. 7. to make (something) unworkable by causing parts to become stuck, displaced, etc.: to jam a lock. 8. a. to interfere with (radio signals or the like) by sending out other signals of approximately the same frequency. b. (of radio signals or the like) to interfere with (other signals). v.i. 9. to become stuck, wedged, blocked, etc.: This door jams easily. 10. to press or push, often violently, as into a confined space: They jammed into the elevator. 11. (of a machine, part, etc.) to become unworkable, as through the wedging or displacement of a part. 12. to participate in a jam session. n. 13. the act of jamming or the state of being jammed. 14. a mass of objects, vehicles, etc., crammed together in such a way as to severely impede movement: a traffic jam. 15. Informal. a difficult or embarrassing situation; predicament; fix: Their lying got them into a jam. [1700?10; appar. of expressive orig.; compare champ1, dam1] jam2 (d?æm) n. a preserve of slightly crushed fruit boiled with sugar. [1720?30; perhaps identical with jam1] jam?like`, jam?my, adj. Jam. Jamaica. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.Jam a crush or squeeze; a mass of things or persons tightly crowded.Examples: jam of carriages, 1858; of humankind, 1807; of people, 1860; of tarts?Lipton, 1970; of trees, 1838; traffic jam.Dictionary of Collective Nouns and Group Terms. Copyright 2008 The Gale Group, Inc. All rights reserved.marmalade – jam – jelly1. ‘marmalade’Marmalade is a sweet food made from oranges, lemons, limes, or grapefruit. In Britain, people spread it on bread or toast and eat it as part of their breakfast.In English marmalade refers only to a food made from oranges, lemons, limes, or grapefruit. Don’t use it to refer to a similar food made from other fruits, for example blackberries, strawberries, or apricots. A food like this is called jam in British English, and jam or jelly in American English.