the practice of pursuing a hobby
⇒ When asked to explain the purpose of plane-spotting the leader replied, 'Well, there
isn't one really. It's just the sheer joy of group hobbyism.', ⇒ The deli has a wall of posters advertising chicken psychotherapists, tomato genealogists
and all the associated categories of food hobbyism.
Collins English Dictionary. Copyright © HarperCollins Publishers