My definition of "work" is that it is done for anything other than its own sake. It doesn't matter who it's done for or what the benefit of doing it is. House

My definition of "work" is that it is done for anything other than its own sake. It doesn't matter who it's done for or what the benefit of doing it is. Housework is work; writing a blog can be work; cleaning your tools after an enjoyable hobby is work. Anything done in support of something else, whether or not money or other people are involved, is work. Only those things, like eating, sleeping, talking with friends, sex, play, that are done for their own sake are not work. Note also that "effort" is not involved in the definition - I know many people that put more effort into their play than into their jobs.