Lexicon :: Strong's G2840 - koinoō

κοινόω, κοινῷ; 1 aorist infinitive κοινῶσαι (cf. Winer's Grammar, 91 (86)); perfect κεκοίνωκα; perfect passive participle κεκοινωμενος; (κοινός);
1. in classical Greek to make common.
2. in Biblical use (see κοινός, 2),
a. to make (levitically) unclean, render unhallowed, defile, profane (which the Greeks express by βεβηλόω, cf. Winer's De verb. comp. etc. Part ii., p. 24 note 33 (where he calls attention to Luke's accuracy in putting κοινοῦν into the mouth of Jews speaking to Jews (Acts 21:28) and βεβηλοῦν when they address Felix (xxiv. 6))): Revelation 21:27 Rec.; Matthew 15:11, 18, 20; Mark 7:15, 18, 20, 23; passive Hebrews 9:13; τί, Acts 21:28; γαστέρα μαροφαγια, 4 Macc. 7:6.
b. to declare or count unclean: Acts 10:15 (cf. Acts 10:28); Acts 11:9; see δικαιόω, 3.

BLB Scripture Index of Thayer's