Meta-APIs

So what is a "Meta-API?" Recently at TRYNT HQ we found ourselves discussing this very concept.

I found myself thinking of web services like the TRYNT Flickr Suggest Web Service which uses the Flickr API to return tag suggestions (something not accomplished by the original API). At the same time other team members felt the title implied something along the lines of a "meta-search engine" (ie search engine aggregator). Mapstraction was used as an example because it offers a unified API for multiple mapping APIs.

Let us know what you think! What does "Meta-API" mean to you?