Sense

1. as one walks, onward

Examples

• μήτ’ ἐν ὁδῷ μήτ’ ἐκτὸσ ὁδοῦ προβάδην οὐρήσῃσ μηδ’ ἀπογυμνωθείσ· (Hesiod, Works and Days, Book WD 83:3)
• σὺ δὲ λαμπάδι φλέγων προβάδην ἔξαγ’ ἐπ’ ἀνθηρὸν ἕλειον δάπεδον χοροποιὸν μάκαρ ἥβαν. (Aristophanes, Frogs, Parodos, antistrophe 15)

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