Emily Dickinson Lexicon

RUST, v.i. [Sax. rustian; W. rhyan.]

1. To contract rust; to be oxydized and contract a roughness on the surface. Our armors now may rust. Dryden.
2. To degenerate in idleness; to become dull by inaction. Must I rust in Egypt? Dryden.
3. To gather dust or extraneous matter.