fas From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA syllable used in solfège to represent the fourth note of a major scale. Related wordsSynonymsfosaccatssafiafscfcwscssslcaxeaffsfaligandfezsyndromepbsAssociatedapoptosishermosaprenatalreceptorfetalfattysalvadorchicousdapathwayfacial References Wiktionary — fas Wikipedia — fas