rust
noun
the red or orange coating that forms on the surface of iron when exposed to air and moisture, consisting chiefly of ferric hydroxide and ferric oxide formed by oxidation.
rusts
-
present tense formof rust (3rd person singular).present tense
Used to describe things happening now or regularly.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“It needs a ton of work—even plastic rusts in Key West.”
From The Wall Street Journal ● Jan. 8, 2026
The mineral cave decor — epsomite, mirabilite, sulfate — rusts into the ruddy orange of iron oxide, the deep black of manganese.
From Salon ● Oct. 7, 2023
Carbon steel rusts easily, so those knives have to be consistently washed and dried to avoid discoloration.
From Washington Times ● Jun. 9, 2023
Fungal rusts and smuts that are proliferating in our increasingly warmer and wetter world endanger the world’s coffee supply.
From Washington Post ● Jul. 15, 2022
Nay, but each pearly overflow, as it falls, rusts mind as well as fetter.
From A Few Words About the Devil And Other Biographical Sketches and Essays by Charles Bradlaugh
