コメントありがとうございます！

はい、使えますよ :) Yes, you can.

でも、" （その言葉/それ)はなんという意味ですか" の方が、日本人はよく使うと思います。

But I think you would hear "~ wa nan to iu imi desuka" more often from Japanese people. 

Thank you so much this article was very helpful! ^_^ I have been studying for 12 years, with very little help. I have to start all over again. This is one article was more helpful than all the books I have. Please keep it up! :D

Great article, thank you Misa!

such a good article with the explaination in detail so that i can understand them all in just 15 mins 

きようはありがとうございました

みんな、ありがとう xx  Thanks, guys!

You'd have to say 

もうちょっとゆっくりいってください。

ちょっとゆっくり just means "a little bit slowly". 

If you mean "a little slowER", then add もう in the beginning.

もうちょっと or もうすこし (= a bit more) + adverb.