Tähistaja on pilt, häälik (heliline kujutis või märk), tähenduse kandja ja tähistustoimingu osa. Ka Signaal
Tühi Tähistaja on tähistaja – Signaal millel pole otsest tähendust, selle annab igaüks vastavalt oma nägemusele ja vajadusele.
- nn. Social Justice
(semiotics) Variously defined as a signifier with a vague, highly variable, unspecifiable, or non-existent signified. Such signifiers mean different things to different people: they may stand for many or even any signifieds; they may mean whatever their interpreters want them to mean. Those who posit the existence of such signifiers argue that there is a radical disconnection between signifier and signified (see also poststructuralism). For a Saussurean semiotician no signifier can exist without a corresponding signified—to qualify as a sign something must be signified.
A floating signifier (also sometimes referred to as an empty signifier, but Ernesto Laclau separates both concepts) is a signifier without a referent in semiotics and discourse analysis, such as a word that points to no actual object and has no agreed upon meaning. The term open signifier is sometimes used as a synonym due to the empty signifier’s nature to “resist the constitution of any unitary meaning” thus enabling its ability to remain open to different meanings in different contexts.