orthos

ὀρθός, ή, όν,
straight,
I in height, upright, standing, Refs 8th c.BC+, who commonly joins it with στῆναι, στῆ δ᾽ ὀρθός Refs 8th c.BC+; ὀρθαὶ τρίχες ἔσταν Refs 8th c.BC+; ὀρθὸν οὖς ἵστησι pricks up his ear, Refs 5th c.BC+; applied to the erect posture of man, Refs 4th c.BC+; ὀ. θηρίον, of man, Refs 4th c.BC+; of buildings, standing with their walls entire, [τὸ Πάνακτον] ὀρθὸν παραδοῦναι Refs 5th c.BC+; of a standing crop, Refs 2nd c.AD+ adverb, ὀρθῶς ἑστῶτες Refs 4th c.BC+
I.b Geometry texts, at right angles to.., εὐθεῖα πρὸς ἐπίπεδον ὀρθή ἐστιν ὅταν.. Refs 3rd c.BC+
I.c Astrology texts, ὀρθὰ ζῴδια signs which rise vertically, opposed to πλάγια, Refs 2nd c.AD+
II in line, straight (opposed to σκολιός crooked and πλάγιος aslant), ἀντ᾽ ἠελίου τετραμμένος ὀρθός straight, right opposite the sun, Refs 8th c.BC+; ποιῶν ὀρθὰ πάντα πρὸς κανόνα Refs 2nd c.BC+; ὀ. τρῶμα longitudinal to the muscle, opposed to ἐπικάρσιος, Refs 6th c.BC+; ὀρθὴν κελεύεις, i. e. ὀρθὴν ὁδόν με ἰέναι κ., Refs 5th c.BC+; so ὀρθὴν ἄνω δίωκε (i.e. όδόν) Refs 4th c.BC+; δι᾽ ὀρθῆς τήνδε ναυκληρεῖς πόλιν (i.e. ὁδοῦ) Refs 5th c.BC+; εἰς ὀρθὸν ἀποδοῦναι to face the front originally held, Refs 4th c.BC+; also ὀρθᾷ χερί straightway, Refs 5th c.BC+; ὀρθῷ ποδίRefs; but τιθέναι ὀρθὸν πόδα is probably to put the foot out, as in walking, Refs 5th c.BC+
II.2 βλέπειν ὀρθά, opposed to being blind, Refs 5th c.BC+recovered his sight, Refs 2nd c.AD+; ἐξ ὀμμάτων ὀ.. κἀξ ὀρθῆς φρενός Refs 5th c.BC+
III metaphorically,
III.1 right, safe, prosperous:
III.1.a partly from significationRefsset them up, restored, Refs 5th c.BC+; so ὀρθὸν ἀστάσας (= ἀναστήσας) Refs 4th c.BC+; ἐς ὀρθὸν ἱστάναι τινά Refs 5th c.BC+; ταύτης ἔπι (i.e. χθονός) πλέοντες ὀρθῆς (the state being represented as a ship) Refs 5th c.BC+
III.1.b partly from signification Refs 5th c.BC+; κατ᾽ ὀρθὸν οὐρίσαι to speed in prosperous course, Refs
III.2 right, true, correct, ἄγγελος, ἀγγελία, νόος, Refs 5th c.BC+; ὄρθ᾽ ἀκούειν to be rightly, truly called, Refs 5th c.BC+strictly speaking, in very truth, Refs: so in adverb, ὀρθῶς λέγειν Refs 5th c.BC+; ὀ. ἔχει it is right, with infinitive, Refs 5th c.BC+: in answers, rightly, exactly, Refs 5th c.BC+: superlative, ὀρθότατα καλεόμενος Refs 5th c.BC+; φωνεῖν δίκης ἐς ὀρθόνRefs 5th c.BC+
III.3 true, real, genuine, ὀ. πολιτεῖαι, opposed to παρεκβάσεις, Refs 4th c.BC+; ὀ. μανία real madness, Refs 3rd c.BC+ adverb -θῶς really, truly, τοὺς ὀ. φιλομαθεῖς Refs 5th c.BC+
III.4 upright, just, ἐμμένειν ὀ. νόμῳ Refs 5th c.BC+uprightness, Refs 5th c.BC+; ἐπιστήμη ἐνοῦσα καὶ ὀ. λόγος (see. λόγος IV. I) Refs; ὁ ὀ. λόγος διὰ πάντων ἐρχόμενος (see. λόγος Refs 3rd c.BC+; ὀ. λόγοι virtues on the intellectual side, Refs 1st c.BC+. adverb ὀρθῶς rightly, justly, Refs 5th c.BC+; ὀ. καὶ νομίμως Refs 5th c.BC+
III.5 of persons, 'straight', straightforward, σμικροὶ καὶ οὐκ ὀρθοὶ τὰς ψυχάς Refs 5th c.BC+
III.6 on tiptoe, full of expectation, excited, ὀρθῆς τῆς πόλεως γενομένης διά τι Refs 5th c.BC+
IV ἡ ὀρθή,
IV.1 (i.e. ὁδός) see above Refs
IV.2 ὀ. γωνία right angle, Refs 5th c.BC+; so ὀ. alone, Refs 4th c.BC+ to cut at right angles, Refs 3rd c.BC+; εἴ τις δείξειεν ὅτι αἱ ὀρθαὶ οὐ συμπίπτουσι.. that right angles do not meet (short for 'that two straight lines making, with a third, interior angles equal to two right angles, etc.'), Refs 4th c.BC+; τὸ δυσὶν ὀρθαῖς the theorem that the angles of a triangle are together equal to two right angles, Refs; ὀρθὸς κῶνος, κύλινδρος, a right cone, cylinder, Refs 3rd c.BC+
IV.3 (with or without πτῶσις) nominative, Latin casus rectus, opposed to the oblique cases, Refs 2nd c.BC+
V ὀρθά active verbs, opposed to ὕπτια (passive) and οὐδέτερα (neuter), Refs 3rd c.BC+
VI ὀ. τόνος real or unmodified (compare above Refs 2nd c.AD+

H. G. Liddell, R. Scott, H. S. Jones, A Greek-English Lexicon (9th ed., 1925–1940) — digitised by the Perseus Digital Library and corrected and expanded by Tyndale House, Cambridge, via STEPBible-Data's TFLSJ table, CC BY 4.0. Covers all of Greek literature, not just the Bible.