When I Googled the definition of “indignancy” for a recent post, I found a brief definition, and I found this:
This word doesn’t usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis. Note that some information is displayed differently in the Unabridged.
To access the complete Unabridged Dictionary, with an additional 300,000 words that aren’t in our free dictionary, start a free trial.
I love the idea that some words are more “premium” than others, and thus, are more expensive. Either that, or the definition is “different” — more correct? — the more money the user is willing to pay. It reminds me a bit of this theory.