English Reference
noun · verb · adjective

rust

n. · v. · adj.
US /ˈɹəst/ UK /ɹˈʌst/ rust UK spelling rusting, rusts

  1. 01 B1 Intermediate Science

    n.the reddish-brown substance that forms on iron or steel when it is exposed to air and water.

    n.the reddish-brown coating formed on iron or steel by oxidation, typically in the presence of moisture.

    Simple

    The old bicycle was covered in rust after being left out in the rain all winter.

    In context

    The structural integrity of the bridge was compromised by deep rust that had accumulated on the support beams over several decades.

  2. 02 B2 Upper Intermediate

    n.a reddish-brown color like the color of rusted metal.

    n.a strong reddish-brown color resembling iron oxide.

    Simple

    She chose a beautiful rust colored dress for the autumn wedding.

    In context

    The hills were a vibrant shade of rust as the sun set, reflecting the high iron content in the exposed rock faces.

    reddish brownterracotta
  3. 03 B1 Intermediate

    v.to become covered in rust or to cause metal to do this.

    v.to undergo or cause to undergo the chemical process of oxidation, specifically in ferrous metals.

    Simple

    If you don't dry your garden tools, they will start to rust very quickly.

    In context

    Saltwater spray from the ocean will rust the iron railings within a single season if they are not treated with a protective sealant.

    corrodeoxidize
  4. 04 C1 Advanced Literary

    v.to lose your ability to do something well because you have not practiced for a long time.

    v.to degenerate or become impaired through inactivity or lack of use.

    Simple

    My piano skills have started to rust since I moved to a house without one.

    In context

    The diplomat feared his negotiating skills would rust during his long assignment to a quiet, stable post with no active conflicts.

  5. 05 B2 Upper Intermediate

    adj.having a reddish-brown color.

    adj.of the color rust; used to describe fabrics, hair, or natural features.

    Simple

    The fox had a thick rust coat that helped it hide among the fallen leaves.

    In context

    The interior designer recommended rust curtains to provide a warm contrast against the cool grey walls of the living room.

    brownish red
This entry
Level B1 · Intermediate
Frequency Frequent
Updated