How does a symbol gain meaning through social convention?

In the study of semantics, a symbol is defined as a sign that relates to its referent solely through convention. Unlike icons, which resemble their referents, or indices, which are causally associated with them, symbols rely on the collective agreement of a group to establish and maintain their meaning.12

This process of social convention functions as follows:

• Group Agreement: The meaning of a symbol—whether it is a word, gesture, or object—is typically based on the active cooperation and consensus of a community that agrees upon what the symbol represents.2
• Underlying Systems: In linguistics, this is often described through the concept of langue, an underlying system of conventions that allows individual utterances to be understood by members of a society.1
• Stability and Change: While symbols tend to be normative and stable, they are not immutable. Their meanings can evolve, disappear, or be reevaluated as a result of cultural, social, or intellectual transformations within a society.3
• Functional Utility: Conventional meaning, such as a red traffic light signifying "stop," allows for predictable communication and coordination within a social framework.4