Lexical Definition

‎ὅριον‎ hórion (hor'-ee-on) region ^G:N-N
neuter of a derivative of an apparently primary (a bound or limit)

border, coast.

• a boundary-line, i.e. (by implication) a frontier (region)

Abbott-Smith

ὅριον, -ου, τό (< ὅρος, a boundary), [in LXX chiefly for גְּבוּל;]
a boundary, bound; chiefly in pl., and so always in NT: Mt 2:16 4:13 8:34 15:22, 39 19:1, Mk 5:17 7:24, 31 10:1, Ac 13:50.†

Abbott-Smith References

Liddell-Scott-Jones

ὅριον, τό,

={ὅρος}, diminutive only in form, boundary, limit, [Refs 5th c.BC+]: mostly in plural, boundaries, bounds, frontier, [Refs 5th c.BC+]; ἐπὶ τοῖς ὁ. on the frontier, [Refs 5th c.BC+]; ὅρια κελεύθου limits of a road, i.e. the road itself, [Refs 5th c.BC+]; territories, [LXX]

__2 Astrology texts, a subdivision of a zodiacal sign, appropriated to a planet, [Refs 2nd c.AD+]
__II plural, rules, e.g. for the use of wine, [Refs 5th c.BC+]
__III ὅριον· τείχισμα, φραγμόν, [Refs 5th c.BC+]

_{LSJ Scripture Refs: LXX.Exod.10.4}