Definition of ROT (original) (raw)

: to undergo decomposition from the action of bacteria or fungi

: to become unsound or weak (as from use or chemical action)

: to cause to decompose or deteriorate with or as if with rot

Too much candy will rot your teeth.

Examples of rot in a Sentence

Verb

The wood had rotted away. The apples were left to rot. the smell of rotting garbage Eating too much candy can rot your teeth. Noun

They found a lot of rot in the house's roof. That's a lot of rot!

Recent Examples on the Web

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Food waste after a party or outdoor snacking session can begin to rot and smell, which won’t be pleasant for you or your neighbors. —Hallie Milstein, Southern Living, 14 May 2026 Dispose of any overripe or rotting produce immediately. —Kate Van Pelt, The Spruce, 13 May 2026

Finally, upgrade your couch-_rot_-and-do-nothing sessions with the TCL 75-inch Class Q6 smart TV, and save 22%. —Juhi Wadia, PC Magazine, 5 May 2026 Wet soil after rain can lead to seed rot or fungal issues, making reseeding necessary. —Lee Wallender, The Spruce, 30 Apr. 2026 See All Example Sentences for rot

Word History

Etymology

Verb

Middle English roten, from Old English rotian; akin to Old High German rōzzēn to rot

First Known Use

Verb

before the 12th century, in the meaning defined at intransitive sense 1a

Noun

14th century, in the meaning defined at sense 1a

Time Traveler

The first known use of rot was before the 12th century