to do a lot of things in a limited period of time; to attract a lot of people to see it / them
pack sb / sth in / into sth
to do a lot of things in a limited period of time
You seem to have packed a lot into your life!
pack sb / sth in / into sth
to put a lot of things or people into a limited space
They've managed to pack a lot of information into a very small book.
pack sb in
to attract a lot of people to see it / them
The show is still packing them in.
pack sth ininformal
to stop doing sth
She decided to pack in her job.
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition