A signalling event on a communications channel; a signal that cannot be further divided into meaningful information.
A type of noun whereby the form refers to the same entity independently of the context; a symbol arbitrarily denotes a referent. See also icon and index.
An internal identifier used by a debugger to relate parts of the compiled program to the corresponding names in the source code.
A character or glyph representing an idea, concept or object.
A summary of a dogmatic statement of faith.
The numerical expression which defines a plane's position relative to the assumed axes.
A thing considered the embodiment of a concept or object.
To symbolize.
A signal; anything that indicates, or is characteristic of, the presence of something else, especially of something undesirable.
A perceived change in some function, sensation or appearance of a person that indicates a disease or disorder, such as fever, headache or rash; strictly, a symptom is felt or experienced by the patient, while a sign can be detected by an observer.