Sense

1. immensely great

Examples

• ὦ μακάρι’ ὦ πλούσιε, ὦ νῦν μὲν οὐδεὶσ αὔριον δ’ ὑπέρμεγασ, ὦ τῶν Ἀθηνῶν ταγὲ τῶν εὐδαιμόνων. (Aristotle, Prologue 4:34)

Source: Henry George Liddell. Robert Scott. "A Greek-English Lexicon". revised and augmented throughout by. Sir Henry Stuart Jones.