To gather together; amass.

“Suzanne collected all the papers she had laid out.”

To get; particularly, get from someone.

“A bank collects a monthly payment on a client's new car loan.   A mortgage company collects a monthly payment on a house.”

To accumulate (a number of similar or related objects), particularly for a hobby or recreation.

“I don't think he collects as much as hoards.”

A hobby including seeking, locating, acquiring, organizing, cataloging, displaying, storing, and maintaining whatever items are of interest to the individual collector.