a market in which there are many buyers and many sellers so that each has a negligible impact on the market price" (and price, remember, is what controls supply produced)
a market in which there are many buyers and many sellers so that each has a negligible impact on the market price, which relates to the competitive job market
A market with many buyers and sellers trading homogeneous products. In competitive markets, since there are many buyers and many sellers, each has a negligible impact on the market price and is said to be a price taker.