Morris Halle, né Pinkowitz, was a Latvian-born American linguist who was an Institute Professor, and later professor emeritus, of linguistics at the Massachusetts Institute of Technology. The father of "modern phonology", he was best known for his pioneering work in generative phonology, having written "On Accent and Juncture in English" in 1956 with Noam Chomsky and Fred Lukoff and The Sound Pattern of English in 1968 with Chomsky. He also co-authored the earliest theory of generative metrics.

Phonology is the branch of linguistics that studies how languages systematically organize their phones or, for sign languages, their constituent parts of signs. The term can also refer specifically to the sound or sign system of a particular language variety. At one time, the study of phonology related only to the study of the systems of phonemes in spoken languages, but may now relate to any linguistic analysis either: