What is the difference between phoneme and morpheme?

A phoneme is a sound segment that is used to distinguish between a word's meanings in a given language; for instance, the sounds /p/ and /p/ are distinct (phonemes are written in slant lines). The smallest linguistic unit that contains meaning or is utilised to show that a word has a certain grammatical function is referred to as a morpheme, on the other hand.
For example, the term uneventful has three morphemes: un- "not," "event," yet only "event" has a distinct meaning.