The word "packed" has several meanings, depending on its context.
1) In a physical sense, it can refer to something that is tightly or closely filled with something else, such as a box being packed full of items, or a room being packed with people.
2) It can also be used in the past tense to describe an action that was done quickly and efficiently, for example "She packed her bags quickly before leaving on vacation."
3) In a figurative sense, it can mean something is very full or busy, such as a schedule being packed with appointments.