"eruption" (of disease, hostilities, etc.), c. 1600, from out + break (v.). Outbreak was a verb in Middle English (c. 1300).

sudden occurrence or rapid increase.

a sudden violent spontaneous occurrence (usually of some undesirable condition); "the outbreak of hostilities" Outbreak is a term used in epidemiology to describe an occurren [..]

n. A sudden and violent breaking forth, as of something that has been pent up or restrained.

oysbrokh

The spread of a disease over a short period in a limited geographic area.

An incident in which two or more people experience the same illness after eating the same food.

(n) a sudden violent spontaneous occurrence (usually of some undesirable condition)

Synonymous with epidemic. Sometimes used to refer to a local epidemic as compared to a larger, general epidemic.

Localized occurrence as opposed to a generalized epidemic.

Sudden increase in the Incidence of a Disease. The concept includes Epidemics and Pandemics.

A sudden occurrence or appearance, as of a disease.

the occurrence of one or more cases in an epidemiological unit.

An outbreak is an epidemic that is limited to a localised increase in the incidence of a disease, for example, to a town or institution.

Spread of disease, which occurs in a short period of time and in a limited geographic location (i.e., neighborhood, community, school, or hospital).

Spread of disease, which occurs in a short period of time and in a limited geographic location (i.e., neighborhood, community, school, or hospital).[2]

Sudden appearance of a disease in a specific geographic area (e.g. neighborhood or community) or population (e.g. adolescents). [7]

Spread of disease, which occurs in a short period of time and in a limited geographic location (i.e., neighborhood, community, school, or hospital)

Sudden appearance of a disease in a specific geographic area, such as a neighborhood or a community, or in a population, such as adolescents.

(OUT-breyk): A sudden rise in the incidence of a disease.

a sudden increase in the number of cases of an illness

A sudden appearance of a disease in a specific geographic area.

Sudden appearance of a disease in a specific geographic area (e.g. neighborhood or community) or population (e.g. adolescents).

An incident in which two or more people experience the same illness after eating the same food.

When more than one person eats a contaminated food and becomes ill.

A sudden increase in the occurrence of a particular disease in a localized group, such as the population of a city.

In incident in which two or more individuals, thought to have common exposure, experience similar illness or proven infection. At least one of them has to have been ill

Synonymous with epidemic. Sometimes the preferred word, as it may escape sensationalism associated with the word epidemic. Alternatively, a localized as opposed to generalized epidemic.

A small localized cluster of cases of a condition, usually an infectious disease.

A large-scale temporary increase in population causing severe damage over a large geographic area. Parasite

An increase in the incidence of a disease that is limited to an institution, a neighbourhood, or a small community.