overstimulate

American  

[oh-ver-stim-yuh-layt] / ˌoʊ vərˈstɪm jəˌleɪt /

verb (used with object)

overstimulated, overstimulated

1. to stimulate (something) to an excessive or harmful degree.

2. Physiology. to cause (someone) to experience sensory overload.

3. Physiology. to cause (a gland, nerve, or other organ) to become overactive and produce an abnormal increase in its usual activity.

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verb (used without object)

overstimulated, overstimulated

1. Physiology. (especially of a gland or nerve) to become overactive and produce an abnormal increase in its usual activity.

Other Word Forms

• overstimulation
  noun
• overstimulative
  adjective
• overstimulatory
  adjective

Explanation

Overstimulate means to overwhelm someone, or make something overactive. Feeling angry, frustrated, or upset in a noisy or brightly lit space might suggest that you're easy to overstimulate. Caffeine might overstimulate your brain and make it difficult to sleep, or loud music which is fun at first might eventually make you feel overwhelmed, or overstimulated. Stimulate means "to provide stimulus or input." Overstimulate means "to provide an overwhelming amount of input."

Example Sentences

See Examples For:

overstimulate overstimulated

The pulsating music, giant inflatables tossed into the crowd and sudden blasts of fog can overstimulate kids.

From Los Angeles Times ● Jul. 3, 2025

The smells, lights, textures, and crowds in the ER can overstimulate a person with autism, she said.

From Seattle Times ● Apr. 11, 2024

Alicia also says day-to-day activities, like grocery shopping, medical appointments and haircuts, have been abandoned, as she prioritises preventing situations that could overstimulate her son.

From BBC ● Jan. 3, 2024

Making a room hypertransparent for people who are deaf may overstimulate people who are autistic.

From Scientific American ● Mar. 20, 2023

At St. Louis, for instance, in 1904, everything seemed to have been done to excite, to overstimulate, to develop a craving for something new, to make one look for the next thing.

From The Art of the Exposition by Neuhaus, Eugen

But if they are overstimulated, they will have the opposite effect, creating stomach cramping, vomiting, nausea, irritability, and panic when exposed to even a small amount.

From Slate ● Jun. 13, 2026

Dopamine is a chemical that helps regulate movement but also plays a key role in motivation and reward, which can be overstimulated by these medications.

From BBC ● Feb. 21, 2026

These overstimulated immune cells then move toward the dorsal root ganglia -- the sensory nerve hubs that link the limbs to the spinal cord -- and release inflammatory compounds that irritate and damage nerves.

From Science Daily ● Nov. 21, 2025

I get so overstimulated at Suppa Club, so the day after, I just have to sit in silence by myself.

From Los Angeles Times ● Nov. 11, 2024

Images of his father danced in the havoc of a brain overstimulated by events.

From "The Great Santini" by Pat Conroy