SE'RIES, noun [Latin this word probably belongs to the Shemetic, the primary sense of which is to stretch or strain.]

1. A continued succession in the things of the same order, and bearing the same relation to each other; as a series of kings; a series of successors.

2. Sequence; order; course; succession of things; as a series of calamitous events.

3. In natural history, an order or subdivision of some class of natural bodies.

4. In arithmetic and algebra, a number of terms in succession, increasing or diminishing in a certain ratio; as arithmetical series and geometrical series. [See Progression.]