John Robert "Haj" Ross (born May 7, 1938) is a poet and linguist.
He played a part in the development of generative semantics (as opposed to interpretive semantics) along with George Lakoff, James D.
McCawley, and Paul Postal.
He was a professor of linguistics at MIT from 1966–1985 and has worked in Brazil, Singapore and British Columbia.
He is currently at the University of North Texas.
Ross's 1967 MIT dissertation is a landmark in syntactic theory and documents in great detail Ross's discovery of islands.
Ross is also well known for his onomastic fecundity; he has coined many new terms describing syntactic phenomena that are well known to this day, including copula switch, Do-Gobbling, freeze(s), gapping, heavy NP shift, (inner) islands, myopia, the penthouse principle, pied piping, pruning, scrambling, siamese sentences, sluicing, slifting, sloppy identity, sounding, squib, squishes, viability, and syntactic islands.