Lexical Definition

‎ὅρασις‎ hórasis (hor'-as-is) appearance/vision ^G:N-F
from ‎ὁράω‎

sight, vision.

• the act of gazing, i.e. (externally) an aspect or (internally) an inspired appearance

Abbott-Smith

ὅρασις, -εως, ἡ (ὁράω), [in LXX chiefly for מַרְאֶה, חָזוֹן and cognate forms;]
1. in Arist. and later writers, the act of seeing, the sense of sight, and by meton., pl., the eyes.
2. appearance (Nu 24:4, Ez 1:5, Si 41:20, al.): Re 4:3.
3. = ὅραμα, a vision: Ac 2:17(LXX), Re 9:17.†

Abbott-Smith References

Liddell-Scott-Jones

ὅρασις-ᾱσις, εως, ἡ,

seeing, the act of sight, [Refs 4th c.BC+]; distinguished as the ἐνέργεια or act from ὄψις (the sense or faculty), [Refs 4th c.BC+]; but, power of sight, [Refs]

__2 plural, eyes, τὰς ὁ. ἐκκόπτειν [ὅρασιςασιν αὑτοῦ (i.e. τοῦ Ἡλίου) “OGI” 56.56 (Canopus, 3rd c.BC). ">Refs 3rd c.BC+]
__II a vision, [LXX+NT]
__III appearance, ὅμοιος ὁράσει λίθῳ ἰάσπιδι [NT]

_{LSJ Scripture Refs: LXX.Joel.2.28 ☩ Acts.2.17 ☩ Rev.4.3}