Wordnet 3.0
ADJECTIVE (1)
1. 
 filled to capacity; 
- Example: "a suitcase jammed with dirty clothes"- Example: "stands jam-packed with fans"- Example: "a packed theater"[syn: jammed, jam-packed, packed]
WordNet (r) 3.0 (2006):
jam-packed
    adj 1: filled to capacity; "a suitcase jammed with dirty
           clothes"; "stands jam-packed with fans"; "a packed
           theater" [syn: jammed, jam-packed, packed]