hobby

An activity that one enjoys doing in one's spare time.

I like to collect stamps from different countries as a hobby.

take up a hobby

An extinct breed of horse native to the British Isles, also known as the Irish Hobby.

Synonym of hobby horse (“a favorite topic”).

"Well, I think East is right," said Arthur; "I can't see but what it's right to do the best you can, though it mayn't be the best absolutely. Every man isn't born to be a martyr." "Of course, of course," said East; "but he's on one of his pet hobbies. — How often have I told you, Tom, that you must drive a nail where it'll go."

Any of four species of small falcons in the genus Falco, especially Falco subbuteo.

He hawked – from nearby Esher, Richard Fox sent a servant with a hobby, which Henry received enthusiastically – and hunted, sending a present of freshly slaughtered deer to Princess Mary.

An English surname transferred from the given name.