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an excess over what is normal or needed.
iron overload an excess of iron in the body; see hemochromatosis, hemosiderosis, and siderosis.
sensory overload a condition in which an individual receives an excessive or intolerable amount of sensory stimuli, as in a busy hospital or clinic or an intensive care unit; the effects of sensory overload are similar to those of sensory deprivation, including confusion and hallucination.


1 a burden greater than the capacity of the system designed to move or process it.
2 (in physiology) any factor or influence that stresses the body beyond its natural limits and may impair its health.


To exceed the capacity of a cell, physiological process, organism, or system, causing it to fail. overload

circulatory overload

Volume overload.

fluid overload

Volume overload.

iron overload

Organ failure caused by excessive accumulation of iron in the body, usually from frequent transfusions or hemochromatosis.

pressure overload

Demand placed on muscle, esp. heart muscle, in response to high blood pressure or stenotic valves. Over time pressure overload results in cardiac hypertrophy and, eventually, heart failure.

sensory overload

A condition in which sensory stimuli are received at an excessive rate or intensity. Sensory overload can produce increases in heart rate, breathing, blood pressure, confusion, anxiety, mental distress, and/or erratic behavior.

stress overload

Excessive amounts and types of demands that require action.

volume overload

An excess of blood or body fluids in the circulation or extracellular tissues. It is usually caused by transfusions or excessive fluid infusions that increase the venous pressure, esp. in patients with heart disease, and it can result in heart failure, pulmonary edema, and cyanosis.
Synonym: circulatory overload; fluid overload; hypervolemia


a larger load than the system can comfortably bear.

tube overload
when repeated exposures are made at high output. This may vaporize the target or damage the cathode.
veterinary overload
the popular term for the knowledge explosion and the need to learn more by the veterinarian.
References in periodicals archive ?
Full results for the Delvv Mobile Overload survey are available upon request.
The E300 overload relay contains a patented current-sensing solution, which leverages Rogowski technology.
As important as progressive overload is to the success of the strength training program, it is vital that coaches do not become victims of "paralysis by analysis.
To date, Beck Ag Com and AgCall have used the power of their clients' customers to filter the overload and offer the opportunity for third-party experiential sharing.
A National Air Traffic Services spokeswoman confirmed that 30 overload reports were filed from January to the end of May this year, compared with 12 in the same period last year.
The mill quickly added new separators and low-NPSH removal pumps to handle the greatly increased water flows from the felts; this solved the overload and trip-outs.
Iron overload should be considered for African Americans with unexplained heart failure, cirrhosis, or endocrinopathies.
Iron overload, public health, and genetics: evaluating the evidence for hemochromatosis screening.
Overload occurs when the body is confronted with greater than normal activity and training loads.
Within both popular culture and library and information science research, information overload is usually described or defined by means of anecdote or by associated symptoms.
Communications overload is creating a productivity meltdown.