Definition
A phoneme is the smallest unit of sound in a language that can distinguish one word from another. It's like the basic ingredient in the recipe of spoken language. Changing a phoneme changes the meaning of a word. For example, the words "pat," "bat," and "mat" differ by only one phoneme: /p/, /b/, and /m/, respectively. Think of it as the difference between saying 'ship' and 'sheep'. Phonemes are abstract units, distinct from the actual sounds produced (phones). Languages differ in their inventory of phonemes.