Sense

1. (relative adjective) (often as anaphor to τόσος, or πᾶς, ἅπας) as much as, how much
2. (followed by particles) (ὅσος ἄν) how ever great
3. (ὅσος δή) how great, how ever many
4. (ὁσοσοῦν) ever so small
5. (ὅσοσπερ) even so great as, no greater than
6. (adverbial usages) so far as, so much as
7. (ὅσῳ, ὅσῳ περ, often with comparative) by how much
8. (ἐν ὅσῳ) while

Examples

• ὦ ξένε Ἀθηναῖε, εἶδες γάρ μου τὸν πλοῦτον καὶ τοὺς θησαυροὺς καὶ ὅσος ἄσημος ^ χρυσός ἐστιν ἡμῖν καὶ τὴν ἄλλην πολυτέλειαν, εἰπέ μοι, τίνα ἡγῇ τῶν ἁπάντων ἀνθρώπων εὐδαιμονέστατον εἶναι. (Lucian, Contemplantes, (no name) 10:1)
• χρυσὸς ὅσος παρ ἡμῖν· (Lucian, Contemplantes, (no name) 12:8)
• τοσοῦτος εἰς κακίαν οὗτος, ὅσος εἰς ἀρετὴν ἐκεῖνος. (Lucian, Alexander, (no name) 1:3)
• εἶτα, ὡς ἐγγὺς τοῦ χωρίου ἐγένετο, προελθὼν εἰς αὐτὸ ἔλαβεν ἐκ τῶν ἐνόντων ἱερῶν ὅσος ἐνῆν κοῖλος ἄργυρος: (Aristotle, Economics, Book 2 90:3)
• καὶ τὸν γηγενῆ Τιτυόν, Ἡράκλεις ὅσος: (Lucian, Necyomantia, (no name) 14:8)

Source: Ancient Greek entries from Wiktionary