deteriorates; deteriorated; deteriorating
1
: to become worse as time passes
The weather gradually deteriorated [=worsened] as the day went on.
Her health continues to deteriorate. [=decline]
efforts to save a deteriorating rain forest
The disagreement deteriorated into a fight. [=the disagreement got worse and eventually became a fight]
2
: to make (something) worse
Exposure to rain and sun will gradually deteriorate the paint.
Cite this Entry
“Deteriorate.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/deteriorate. Accessed 12 Jul. 2026.
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