| 1. sweetened fruit preserve, jelly; state of being crowded together; large number of objects that are crowded together and unable to move freely (as in cars or people); awkward situation. crowd, cram together; pack in; become crowded together; become stuck; cause to be stuck; disrupt, block, interfere (as in radio signals); play music in a free and improvisational manner. play jazz, practise music in a small group After the concert, a few musicians started to jam |