+Sema (Ancient Greek: σῆμα) denotes a [Sign](/wiki/Sign) or a distinctive mark, often indicating presence or meaning. It can manifest as a physical [Monument](/wiki/Monument), such as a tombstone, or an abstract indicator conveying a message.
+## See also
+- [Semiotics](/wiki/Semiotics)
+- [Symbol](/wiki/Symbol)
+- [Token](/wiki/Token)
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