Questions about the meaning of a word are on topic, but it's not that simple.
Questions are expected to show research effort, too. So if you ask:
##What does 'gato' mean?
What does 'gato' mean?
You'll gather a large collection of down votes, for not looking the word up in a dictionary before asking here.
On the other hand, if you look the word up, and it doesn't satisfy your inquiry because it's an unusual, or regional meaning, then this is the perfect time to ask here, and you'll probably get up voted.
##Why is a "jack" called "un gato"?