Sense

1. (in the plural) the Seres (the people from whom silk was obtained [i.e., the Chinese])
2. (in the singular, rare) a Chinese

Examples

• ἔστιν ἐν τῇ γῇ ζωύφιόν σφισιν, ὃν σῆρα καλοῦσιν Ἕλληνεσ, ὑπὸ δὲ αὐτῶν Σηρῶν ἄλλο πού τι καὶ οὐ σὴρ ὀνομάζεται· (Pausanias, Description of Greece, , chapter 26 13:1)

Source: Ancient Greek entries from Wiktionary