She, I hope you're not deleting your original comments because of my comment. I was actually referring to qroqqa's citations, not yours.
I agree with mollusque and chained_bear: Don't feel as though you have to backtrack and remove what might seem redundant in retrospect. It's your Wordie, too. Also, you'll drive yourself 'round the bend doing that. :-)
I'm down with people adding usage notes, to augment any of the definitions that might come up with those links. Also sometimes the definitions people add aren't available for lookup. (I've added many like that--some of which were before we had those 12 icons.)
I agree with mollusque also--once they're there, it's no big deal to leave them there, especially if there are comments on the page as well. Before WeirdNet--sorry, WordNet--and the 12 icons, these definition-comments were more frequent, so they're probably still all over the site. :)
I don't see anyone reason to delete the definitions once they're there, and definitely not if they've generated a comment. Another bit of Wordie etiquette is not to delete comments, except for duplicates. Also, defining in your own words or integrating from several sources is good etiquette, even if other online definitions are available.
she, the 12 icons under each word are for dictionary lookup. It's generally considered good Wordie etiquette not to enter a definition in the comments unless absolutely necessary. Please keep that in mind.