What is the meaning of the word "collect"?

Definitions:

make a telephone call or mail a package so that the recipient pays adverb
- call collect
payable by the recipient on delivery adjective
- a collect call
to call for and obtain payment of verb
- we collected over a million dollars in outstanding debts
to gather something verb
- I collected my thoughts before speaking.
to get or bring together verb
- They collected old trading cards.
to get or gather together in an area verb
- The leaves collected in the corner.