Lexical Definition

‎ἐκπίπτω‎ ekpíptō (ek-pip'-to) to fall out ^G:V
from ‎ἐκ‎ and ‎πίπτω‎

be cast, fail, fall (away, off), take none effect.

• to drop away
• specially, be driven out of one's course
• figuratively, to lose, become inefficient

Abbott-Smith

ἐκ-πίπτω [in LXX: Is 40:8 28:1, 4 (הֶבֶל), Jb 14:2 (מָלַל, v. RV. mg), Jb 15:30 (סוּר), Jb 15:33 (שָׁלַךְ hi.), etc. ;]
to fall out of, fall from, fall off: seq. ἐκ τ. χειρῶν, Ac 12:7; absol., Ac 27:32; of the withering of flowers (as LXX, ll c.), Ja 1:11, I Pe 1:24 (LXX); of navigators falling off from a straight course, Ac 27:17, 26, 29. Metaph., c. gen. rei: Ga 5:4, II Pe 3:17; absol., fall from its place, fail, perish: Ro 9:6.†

Abbott-Smith References

Liddell-Scott-Jones

ἐκπίπτω,

future -πεσοῦμαι: aorist ἐξέπεσον: perfect ἐκπέπτωκα:— fall out of, δίφρου [Refs 8th c.BC+]; θαλερὸν δέ οἱ ἔκπεσε δάκρυ fell from his eyes, [Refs]fall out, [Refs]; fall down, of trees, [Refs 4th c.BC+]meteors, [Refs 8th c.BC+]passive of ἐκβάλλω:

__1 of seafaring men, to be cast ashore, ἐκ δ᾽ ἔπεσον θυμηγερέων [Refs 8th c.BC+]; ναυαγὸν ἐ.[Refs 5th c.BC+]; of things, suffer shipwreck, [Refs 5th c.BC+]; of fish, to be cast up, [Refs 4th c.BC+]
__2 fall from a thing, i.e. be deprived of it, ἐκ πολλῶν καὶ εὐδαιμόνων ἐς πτωχηΐην [Refs 5th c.BC+]; τυραννίδος, ἀρχῆς, [Refs 5th c.BC+]
__3 to be driven out, [ἐκ τῆς ἀκροπόλιος] [Refs 5th c.BC+]; to be banished, ἐ. ἐκ τῆς πατρίδος [Refs 5th c.BC+]; ὑπό τινος by a person, ἐκ Πελοποννήσου ὑπὸ Μήδων [Refs 5th c.BC+]
__4 of limbs, to be dislocated, [Refs 5th c.BC+]; of flesh, mortify and separate itself, [Refs]; so ἐ. ὀδόντες, πτερά, [Refs 4th c.BC+]; of atoms, ἐκπεσοῦσαι κατέψυξαν [Refs 4th c.BC+]
__5 go forth, sally out, [Refs 5th c.BC+]; of rays, issue forth, [Refs 2nd c.AD+]
__6 come out, of votes, [Refs 5th c.BC+]; turn out, happen, [Refs 2nd c.AD+]
__7 escape, [Refs 5th c.BC+]
__8 of oracles, issue, χρησμὸς ἐκπίπτει [Refs 1st c.AD+]; to be published, become known, εἰς ἀνθρώπους ἀπαιδεύτους [Refs 5th c.BC+]
__9 depart, ἐκ τῆς ὁδοῦ [Refs 5th c.BC+]
__9.b digress, [Refs 5th c.BC+]; but ἐ. τῆς διανοίας miss the sense, [Refs 6th c.AD+]; fall outside of a class, [Refs 3rd c.AD+]
__10 of things, escape one unawares, φασὶν ἐκπεσεῖν αὐτούς [Refs 4th c.BC+]; of reason, fail, be lacking, [Refs 4th c.BC+]
__11 degenerate, εἰς ἀλλότριον ἦθος [Refs 5th c.BC+]; εἰς τὴν Φρυγιστὶ ἁρμονίαν slip into.., [Refs 4th c.BC+]: absolutely, come to naught, [NT]; to be dilapidated, [Refs]
__12 of actors or dramatic pieces, to be hissed off the stage, [Refs 4th c.BC+]: so of orators, [Refs 5th c.BC+]
__13 ἐ. ἑαυτοῦ lose one's self-control, [Refs 2nd c.AD+]; ἐ. σκοποῦ miss the mark, [Refs]
__14 of things, arise from, ἔκ τινος [Refs 2nd c.AD+]
__15 of money, cease to be current, [Refs 3rd c.BC+]
__16 run to excess, δι᾽ ἀοριστίαν [Refs 4th c.BC+]
__16.b Geometry texts, as passive of ἐκβάλλω, to be produced, [Refs 3rd c.BC+]
__17 die, χθὼν ἐκπιπτόντων [Refs] (unless, = rubbish heap).

_{LSJ Scripture Refs: Rom.9.6}