I have a few students who email "ask Elizabeth" when they need to know the meaning of a word. I'm happy to oblige, it's only two or three times a month and it takes just a second, provided I am at the computer.
A better way for students to get a faster answer about the meaning of a word, of course, is, a bilingual dictionary, or a learner's dictionary, and if one doesn't have such a thing in hand, they are available online.