Simple Definition of arthritis

from our Learner's Dictionary

arthritis

noun

ɑɚˈθraɪtəs How to pronounce arthritis (audio)
medical : a disease that causes the joints of the body to become swollen and painful

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“Arthritis.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/arthritis. Accessed 15 Apr. 2026.

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