hyperactivity

noun hy·per·ac·tiv·i·ty \ ˌhī-pər-ˌak-ˈti-və-tē \
Updated on: 10 Dec 2017

Definition of hyperactivity

1 : the state or condition of being overly active
  • Canada geese are disarmingly expressive. … They disdain the frantic hyperactivity of smaller birds.
  • —Benjamin B. Bachman
2 : increased levels of function or activity especially when considered abnormally excessive
  • She had developed delusions of invincibility, along with bouts of hyperactivity and severe insomnia.
  • —Per Ola and Emily D'Aulaire
; especially : higher than usual levels of movement and activity (such as excessive talking or fidgeting) typically associated with attention deficit disorder
  • An estimated 1 in 50 school-age children in the United States, receive stimulant medication to help quell inattentiveness and hyperactivity.
  • —Christine Mlot

Recent Examples of hyperactivity from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hyperactivity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of hyperactivity

1888


Medical Dictionary

hyperactivity

noun hy·per·ac·tiv·i·ty \ ˌhī-pə-ˌrak-ˈtiv-ət-ē \

medical Definition of hyperactivity

plural hyperactivities
: a state or condition of being excessively or pathologically active; especially : attention deficit disorder


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