Noah Webster's Dictionary 1. (n.) The reddish yellow coating formed on iron when exposed to moist air, consisting of ferric oxide or hydroxide; hence, by extension, any metallic film of corrosion. 2. (n.) A minute mold or fungus forming reddish or rusty spots on the leaves and stems of cereal and other grasses (Trichobasis Rubigo-vera), now usually believed to be a form or condition of the corn mildew (Puccinia graminis). As rust, it has solitary reddish spores; as corn mildew, the spores are double and blackish. 3. (n.) That which resembles rust in appearance or effects. 4. (n.) A composition used in making a rust joint. See Rust joint, below. 5. (n.) Foul matter arising from degeneration; as, rust on salted meat. 6. (n.) Corrosive or injurious accretion or influence. 7. (v. i.) To contract rust; to be or become oxidized. 8. (v. i.) To be affected with the parasitic fungus called rust; also, to acquire a rusty appearance, as plants. 9. (v. i.) To degenerate in idleness; to become dull or impaired by inaction. 10. (v. t.) To cause to contract rust; to corrode with rust; to affect with rust of any kind. 11. (v. t.) To impair by time and inactivity. Int. Standard Bible Encyclopedia RUST rust (chel'ah; brosis): Strictly speaking rust is the red oxide of iron formed by the corrosion of that metal, but by extension it has come to mean corrosion produced on any metal. Chel'ah is translated "rust" in Ezekiel 24:11, 12. This rendering is probably based on 24:11. Copper caldrons are still used in Bible lands. Such vessels must be constantly watched when on the fire to guard against the possibility of their becoming dry. If this should happen the contents, whatever they may be, and the vessel itself will be injured. The copper of the caldron oxidizes and scales off in black or brownish scales, or rust. ios, was used in Greek to denote the corroding of metals. In James 5:3 occurs, "Your gold and your silver are rusted; and their rust.... shall eat your flesh as fire." The writers must have had in mind the actions of chemicals upon these metals which formed some such compound as the caustic silver nitrate. Brosis, literally, "eating," which occurs in Matthew 6:19, 20, may refer to the diseases which attack such vegetation as wheat, grapes, cucumbers, etc. In no country is the saying "where moth and rust consume" (Matthew 6:19) more true than in Syria. Any metal subject to corrosion seems to rust faster in that country than anywhere else. There are also many rusting fungi which the people have not learned to destroy and which do much damage to the crops. See also SCUM. James A. Patch

Multi-Version Concordance Rust (7 Occurrences) Matthew 6:19 "Don't lay up treasures for yourselves on the earth, where moth and rust consume, and where thieves break through and steal; (WEB KJV ASV DBY WBS YLT NAS RSV NIV) Matthew 6:20 but lay up for yourselves treasures in heaven, where neither moth nor rust consume, and where thieves don't break through and steal; (WEB KJV ASV DBY WBS YLT NAS RSV NIV) James 5:3 Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire. Ye have heaped treasure together for the last days. (KJV WEY ASV WBS YLT NAS RSV) Ezekiel 24:6 Therefore thus says the Lord Yahweh: Woe to the bloody city, to the caldron whose rust is therein, and whose rust is not gone out of it! take out of it piece after piece; No lot is fallen on it. (WEB ASV DBY NAS RSV NIV) Ezekiel 24:11 Then set it empty on its coals, that it may be hot, and its brass may burn, and that its filthiness may be molten in it, that its rust may be consumed. (WEB ASV DBY NAS RSV) Ezekiel 24:12 She has wearied herself with toil; yet her great rust doesn't go forth out of her; her rust doesn't go forth by fire. (WEB ASV DBY NAS RSV NIV) Ezekiel 24:13 In your filthiness is lewdness: because I have cleansed you and you weren't cleansed, you shall not be cleansed from your filthiness any more, until I have caused my wrath toward you to rest. (See RSV)