Q:

What tag should I use for a question asking the meaning of a word/phrase?

What tag should be used for a question asking the meaning of a word/phrase? Since there is already word-choice and word-usage, would word-meaning be helpful? 

A:

I agree, word-meaning should be used instead of meaning, as it is more regular to the other tags.
Also, I think the tag meaning-in-context should be used only if the meaning of the word/sentence changes depeding of the context. Almost all questions using this tag do not provide a context, so they should be retagged word-meaning. (Maybe we don't need phrase-meaning since it is very rare that words get a specific meaning when grouped together).

