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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 ?
The ratios of HPCs and HSCs in bone marrow were analyzed by flow cytometry (Figure 2A), and we found that iron overload significantly decreased the frequency of HPCs and HSCs.
Hypothesis 3: Usefulness will negatively moderate the relationship between information overload and anger, such that it is weaker when employees perceive a high, vs.
Brissot The relationship between iron overload clinical symptoms and age in 410 patients with genetic hemochromatosis.
But that's not how we think about information overload now, even though the amount of information far outstrips what Toffler feared would unhinge us.
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.
He describes part of a recent dilemma posed by a client was the need to get through the overload with several product messages to ensure a new product was used correctly and performed exceptionally.
Flows that are 2-3 times the rated flow usually cause motor overloads or belt drive failures unless the motors are oversized.
Iron overload should be considered for African Americans with unexplained heart failure, cirrhosis, or endocrinopathies.
Iron overload occurs in rural African people who ingest a traditional beverage that contains a large amount of iron.
Iron overload, public health, and genetics: evaluating the evidence for hemochromatosis screening.
The authors concluded that adequate hematocrits could be achieved with parenteral iron and EPO without risking iron overload (Coco & Dressler, 1999).
Although this age is developing and evolving, some have described networks, (14) globalization, (15) diffusion of power away from professionals, (16) and information overload (17) as direct results of the Information Revolution.