The previous version of Google's
definition: search, showed some language options, so I could lookup the definition of a term in other languages. But since they updated it, I can't find those options anymore. Is there anyway to reach them?
This has now been changed. You have to change the search language in order to see the other definitions—if the word exists in the chosen language.
To see definitions in other languages, click on the cog wheel in the upper-right corner, and choose Languages.
Choose the language and click Save.
Now the definition will be shown for the chosen language.
As far as I understand, this is how they changed it: First, you look up the definition using
define: and if you click on ">>More" link placed next to the result, the definiton page opens. At the lower right corner, there is a box called Related Languages (it says: this term is also a word in ...). So when you click on one of them, you can see the definition in that language. For example: