This is very common in language often words get taken over by society to mean other than what was the original intent of the coiner.

Take "meme" for instance. Dawkins originally intended this to mean any idea that left an individual's mind and he described how ideas were comparable to genes in as far as how they died or thrived within the memetic pool of the society within which they exist.

Now it means crappy images/gifs.

As an aviation and airport runway materials sciences layman tarmac to me "means" runway. Society may have usurped it from its original meaning, but it is what is is now.