Lexical Definition

‎ἀφορίζω‎ aphorízō (af-or-id'-zo) to separate ^G:V
from ‎ἀπό‎ and ‎ὁρίζω‎

divide, separate, sever.

• to set off by boundary, i.e. (figuratively) limit, exclude, appoint, etc.

Abbott-Smith

ἀφ-ορίζω, [in LXX (Cremer, 805 f.) for בּדל hi., סגר hi., נוף hi., רום hi etc.;]
(a) to mark off by boundaries from, separate from: c. acc., Ac 19:9, Ga 2:12; id. seq. ἐκ (ἀπό), Mt 13:49 25:32 (MM, s.v.); of excommunication, Lk 6:22. Pass., absol., II Co 6:17;
(b) to set apart, devote to a special purpose (seq. εἰς): c. acc., Ga 1:15. Mid., Ac 13:2, Ro 1:1 (DB, iii 588).†

Abbott-Smith References

Liddell-Scott-Jones

ἀφορίζω-ίζω,

mark off by boundaries, ἐξελόντας [τὸ ὄρος] τῷ θεῷ καὶ ἀφορίζωίσαντας[Refs 4th c.BC+]; οὐσία ἀφωρισμένη property marked out by boundary-pillars, [Refs 4th c.BC+]:—middle, mark off for oneself, appropriate to oneself, χώραν ὅτι πλείστην[Refs 5th c.BC+]: —passive, ἡ ὑπό τινος ἀφορίζωισθεῖσα χώρα[Refs 5th c.BC+]

__b border on, τοὺς ὅρους -ίζοντας τὸν Ἀσωπόν[Refs 5th c.BC+]
__2 determine, define, [Refs]:—also middle, περὶ φύσεως ἀφορίζωιζόμενοι[Refs 4th c.BC+] — passive, χρόνος ἀφωρισμένος a determinate time, [Refs 5th c.BC+]; ὅροι -ισμένοι well-defined, [Refs]; ἀφωρισμένα definite cases, [Refs 4th c.BC+]: participle ἀφορίζωίσας definitely, [Refs 4th c.BC+]
__3 separate, distinguish, [Refs 5th c.BC+]; exclude, [Refs 5th c.BC+]:—middle, [Refs 5th c.BC+]:—passive, ἀφορίζωίζεσθαι ἀπό τινος[Refs] distinct species, [Refs 4th c.BC+]
__4 bring to an end, finish, βίβλους[Refs 2nd c.BC+]:— middle, λόγον[Refs 5th c.BC+]
__5 grant as a special gift, τᾷ κάλλος ἀφώρισε Κύπρις[Refs]
__II with accusative person,
__II.1 banish, καί μ᾽ ἀπὸ γᾶς ὥρισε[Refs 5th c.BC+]
__II.2 separate, [NT]:—passive, ἱερέων γένος ἀπὸ τῶν ἄλλων-ισμένον[Refs 5th c.BC+]; ἐκ τινῶν ἀφωρισμένων from a definite class of persons, [Refs 4th c.BC+]; ἀφωρισμένος τέχνην having a definite art assigned one, [Refs 5th c.BC+]
__II.2.b set apart for rejection, cast out, excommunicate, [NT]
__II.2.c set apart for some office, appoint, ordain, [NT]
__II.2.d passive, ἀρχὴ ἀφωρισμένη πρὸς τὰς θυσίας[Refs 4th c.BC+]; of a treatise, to be devoted to, with dative, [Refs 6th c.AD+]

_{LSJ Scripture Refs: Acts.19.9 ☩ Luke.6.22 ☩ Acts.13.2 ☩ Rom.1.1 ☩ Gal.1.15}