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.

---

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

In children, this process is already happening at a high rate, so retinol offers no real benefit and can overstimulate the skin.

From BBC ● Jun. 6, 2026

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

From Los Angeles Times ● Jul. 3, 2025

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

From Scientific American ● Mar. 20, 2023

This happens when companies use a combination of salt, sugar and fat to create foods that overstimulate the taste buds — and yet are designed to never quite leave you feeling satisfied.

From Salon ● Jan. 16, 2023

The entire body is unduly sensitized, and the boy is besieged by an army of new and vivid sense impressions that overstimulate, confuse, and baffle him.

From The Minister and the Boy A Handbook for Churchmen Engaged in Boys' Work by Hoben, Allan

I’m sure the scientific explanation involves ecstatic brain hormones, leading to an overstimulated smile reflex.

From The Wall Street Journal ● Jul. 25, 2026

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

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

She explains her son is overstimulated by the typical classroom setting, which has led to a pattern of school refusal and daily meltdowns.

From BBC ● Jan. 3, 2024

I even find myself telling her about how humanity is off course, how we’re overconnected, overstimulated, undernourished.

From "The Wrong Way Home" by Kate O’Shaughnessy