Lexical Definition

‎συνείδησις‎ syneídēsis (soon-i'-day-sis) conscience G:N-F
from a prolonged form of ‎συνείδω‎

conscience.

Usage: 6 forms in 32 verses
Form Translated As     In Verse(s)
συνειδήσεώσ conscience Rom.9.1
συνειδήσεωσ a conscience 1Tim.1.5Heb.10.22
conscience John.8.9Rom.2.151Cor.10.292Cor.1.12
of a conscience 1Pet.3.21
συνειδήσεσιν consciences 2Cor.5.11
συνειδήσει a conscience 1Tim.3.9
conscience Acts.23.12Tim.1.3
your conscience LXX.Eccl.10.20
συνείδησισ conscience 1Cor.8.71Cor.8.10Titus.1.15
συνείδησιν a conscience Acts.24.161Pet.3.16
conscience Rom.13.51Cor.8.121Cor.10.251Cor.10.271Cor.10.281Cor.10.292Cor.4.21Tim.1.191Tim.4.2Heb.9.9Heb.9.14Heb.10.2Heb.13.181Pet.2.19

Abbott-Smith

συν-είδησις, -εως, ἡ (< συνεῖδον), [in LXX: Ec 10:20 (מַדָּע), Wi 17:11, Si 42:18 א * ;]
1. consciousness: c. gen. obj., He 10:2, I Pe 2:19.
2. In ethical sense, innate discernment, self-judging consciousness, conscience (Stoics and late writers): Ro 2:15 9:1, I Co 10:29, II Co 1:12 4:2 5:11, I Ti 4:2, He 9:14; σ. ἀγαθή, Ac 23:1, I Ti 1:5, 19, I Pe 3:16, 21; ἀσθενής, I Co 8:7, 10; ἀσθενοῦσα, ib. 12; ἀπρόσκοπος, Ac 24:16; καθαρά, I Ti 3:9, II Ti 1:3; καλή, He 13:18; πονηρά, He 10:22; ὁ νοῦς καὶ ἡ σ., Tit 1:15; διὰ τὴν σ., Ro 13:5, I Co 10:25, 27, 28; κατὰ σ., He 9:9; ὑπὸ (τῆς) σ., [9](/btb/interlinear/43%20-%20John/8/John.8.9.html)] (Rec.), I Co 10:29 (cf. Cremer, 233 ff.; ICC on Ro 2:15; DB, i, 468 ff.).†

Abbott-Smith References

Book Refs
Ecclesiastes 10:20
John 8:9
Acts 23:1 · 24:16
Romans 2:15 · 9:1 · 13:5
1 Corinthians 8:7 · 8:10 · 8:12 · 10:25 · 10:27 · 10:29
2 Corinthians 1:12 · 4:2 · 5:11
1 Timothy 1:5 · 1:19 · 3:9 · 4:2
2 Timothy 1:3
Titus 1:15
Hebrews 9:9 · 9:14 · 10:2 · 10:22 · 13:18
1 Peter 2:19 · 3:16 · 3:21

Liddell-Scott-Jones

συνείδησις, εως, ,

knowledge shared with another, τῶν ἀλγημάτων (in a midwife) [Refs 2nd c.AD+]

__2 communication, information, εὑρήσεις σ. [Refs 2nd c.AD+]; σ. εἰσήνεγκαν τοῖς κολλήγαις αὐτῶν [Refs 3rd c.AD+]
__3 knowledge, λῦε ταῦτα πάντα μὴ διαλείψας ἀγαθῇ σ. (variant{ἀγαθῇ τύχῃ}) [Refs 5th c.BC+]
__4 consciousness, awareness, [τῆς αὑτοῦ συστάσεως] [NT+5th c.BC+]; inner consciousness, ἐν σ. σου βασιλέα μὴ καταράσῃ [LXX+NT]
__5 consciousness of right or wrong doing, conscience, Periander and [Refs 6th c.BC+]; ἐὰν ἐγκλήματός τινος ἔχῃ σ. [Refs] (a) ii 19; βροτοῖς ἅπασιν σ. θεός [NT+4th c.BC+]; ἀπρόσκοπος πρὸς τὸν θεόν[NT+2nd c.AD+]; κολαζομένους κατὰ συνείδησιν [Refs 2nd c.AD+]; τὸν.. θεὸν κεχολωμένον ἔχοιτο καὶ τὴν ἰδίαν σ. [Refs]; conscientiousness, [Refs 6th c.AD+].--Senses 4 and 5 sometimes run one into the other, see [NT]
__6 complicity, guilt, crime, περὶ τοῦ πεφημίσθαι αὐτὴν ἐν σ. τοιαύτῃ [Refs 2nd c.AD+]

LSJ Scripture Refs: 2Cor.4.21Pet.2.19Heb.10.2LXX.Eccl.10.201Cor.8.7Acts.23.11Tim.3.91Cor.8.7