rottenest; rottener

Use the adjective rotten to describe something that is decaying or decayed. If you are like most people, you occasionally have to throw out rotten food — sometimes, it's so nasty you can't even tell what the food was in its original form!

The adjective rotten also describes something that is very poor in quality. If your car has a flat tire, your dog threw up on the carpet, and your boss yelled at you, you can say you are having "a rotten day." Another use for rotten is to describe something that is damaged by decay. Weather damage can cause boards to rot, so if you are working on an old house, you should especially watch out for rotten floor boards. You wouldn't want to fall through to the basement!

Definitions of rotten
  1. adjective
    having decayed or disintegrated; usually implies foulness
    “dead and rotten in his grave”
    lacking freshness, palatability, or showing deterioration from age
  2. adjective
    damaged by decay; hence unsound and useless
    rotten floor boards”
    synonyms: decayed, rotted
    not in good condition; damaged or decayed
  3. adjective
    very bad
    synonyms: icky, lousy, stinking, stinky
    having undesirable or negative qualities
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