the world > relative properties > number > specific numbers > one > firstness > [noun] > first one > of its kind (3)
The first of its kind to be produced, come into being, or appear; the first product or result of anything. Cf. first fruit, n. 2.
As a count noun. Originally U.S. The first known or discovered example or specimen of a thing; (now esp.) a first occurrence of something notable…