Sense

1. (of direction) forward to, toward
2. (with genitive) the side of, pertaining to
3. (with dative) by the side of, near to
4. (with accusative) about, according to, against, among, at, because of, before, between,
5. (with accusative) by, for, at someone's house, in, for intent, nigh unto, of, which pertain to, that, to (the end that), together, to ([you]) -ward, unto, with (-in)

Examples

• καὶ ἔπλασεν ὁ Θεὸσ ἔτι ἐκ τῆσ γῆσ πάντα τὰ θηρία τοῦ ἀγροῦ καὶ πάντα τὰ πετεινὰ τοῦ οὐρανοῦ καὶ ἤγαγεν αὐτὰ πρὸσ τὸν Ἀδάμ, ἰδεῖν τί καλέσει αὐτά. καὶ πᾶν ὃ ἐὰν ἐκάλεσεν αὐτὸ Ἀδὰμ ψυχὴν ζῶσαν, τοῦτο ὄνομα αὐτῷ. (Septuagint, Liber Genesis 2:19)
• καὶ ᾠκοδόμησεν ὁ Θεὸσ τὴν πλευράν, ἣν ἔλαβεν ἀπὸ τοῦ Ἀδάμ, εἰσ γυναῖκα καὶ ἤγαγεν αὐτὴν πρὸσ τὸν Ἀδάμ. (Septuagint, Liber Genesis 2:22)
• ἕνεκεν τούτου καταλείψει ἄνθρωποσ τὸν πατέρα αὐτοῦ καὶ τὴν μητέρα καὶ προσκολληθήσεται πρὸσ τὴν γυναῖκα αὐτοῦ, καὶ ἔσονται οἱ δύο εἰσ σάρκα μίαν. (Septuagint, Liber Genesis 2:24)
• καὶ τῇ γυναικὶ εἶπε. πληθύνων πληθυνῶ τὰσ λύπασ σου καὶ τὸν στεναγμόν σου. ἐν λύπαισ τέξῃ τέκνα, καὶ πρὸσ τὸν ἄνδρα σου ἡ ἀποστροφή σου, καὶ αὐτόσ σου κυριεύσει. (Septuagint, Liber Genesis 3:16)
• οὐκ ἐὰν ὀρθῶσ προσενέγκῃσ, ὀρθῶσ δὲ μὴ διέλῃσ, ἥμαρτεσ̣ ἡσύχασον. πρὸσ σὲ ἡ ἀποστροφὴ αὐτοῦ, καὶ σὺ ἄρξεισ αὐτοῦ. (Septuagint, Liber Genesis 4:7)

Source: Ancient Greek entries from Wiktionary