Something which is ’outmoded’ or ’outdated’ is no longer in fashion or trendy. Something ’outdated’ might not be the preferred way of doing or approaching something anymore. 

1. I think I need a new laptop. This one is getting really outdated, and it's not compatible with software updates.
2. None of these apps work on my phone because it's running an outdated operating system.

1. The company was really suffering because of their outmoded production method. Their competitors were doing it the new way.