#redirect In the [[linguisticslinguistic]]functionalism of the Prague [[School]] and the [[work]] of [[Jakobson]], a [[phoneme]] is defined as a phonological unit with a distinctive function that cannot be broken down into smaller units with similar functions. A [[phoneme]] is defined by its distinctive features, such as its [[being]] voiced (/v/) or non-voiced (/f/). the [[list]] of [[phoeneme]]s making up any given [[language]] is a closed list; Castilian employs twenty-four phonemes.