In linguistics, specifically phonetics and phonology, schwa (also spelled shwa) can mean the following:An unstressed and toneless neutral vowel sound in some languages, often but not necessarily a mid-central vowel. Such vowels are often transcribed with the symbol, regardless of their actual phonetic value.The mid-central vowel sound (rounded or unrounded) in the middle of the vowel chart, stressed or unstressed. In IPA phonetic transcription, it's written as . In this case the term mid-centra… (More on Schwa)