1. To link things together in a chain or a series: To concatenate means to put two or more computer files or pieces of computer information together in order to form a single unit.
2. In medicine, indicating the arrangement of a number of bodily structures: Enlarged lymph glands are concatenated in a row like the links of a chain.

A chainlike series associated with nerve cells or physiological reflexes are also concatenated.

3. Etymology: from Latin concatenare, "to link together"; from con-, "together" + catenare, "to chain, to bind".