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obesity

/oʊˈbɛsɪti/ · ob·e·si·ty
noun
  1. The state of being abnormally or excessively fat. The doctor diagnosed her with obesity after her BMI exceeded 30.
  2. Excessive accumulation of body fat. Obesity can lead to a range of health complications, including type 2 diabetes.
  3. Figuratively, an excess or overabundance of something. The city’s obesity of traffic jams frustrated commuters.
Did you know? The word obesity entered English in the 19th century, and its use has expanded from a purely medical term to a public health concern worldwide.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 14, 2026