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Instance vs Case vs Illustration vs Example vs Sample vs Specimen

Instancecaseillustrationexamplesamplespecimen mean a concrete thing which has or manifests the qualities, characters, or nature of a type, a class, or a group.

Instance applies to an individual person or thing brought forth in support or disproof of a general statement or as a means of indicating the character of a class.

Case applies to an act, situation, condition, or event demonstrating the occurrence or the existence of something which is being considered, studied, investigated, or dealt with or exhibiting it in actual operation.

Illustration applies to an instance adduced or cited as a means of throwing light upon what has been explained or discussed in general terms.

Example (see also MODEL ) applies to a typical, representative, or illustrative instance or case.

sample is a usually randomly selected part or unit of a whole presumed to be typical or representative of the whole from which it is taken.

Specimen and sample are often used without distinction, but specimen is more often the choice when the whole is composed of discrete units that are independent entities.