Se″ries (?), n. [L. series, fr. serere, sertum, to join or bind together; cf. Gr. ��� to fasten, Skr. sarit thread. Cf. Assert, Desert a solitude, Exert, Insert, Seraglio.] 1. A number of things or events standing or succeeding in order, and connected by a like relation; sequence; order; course; a succession of things; as, a continuous series of calamitous events.
During some years his life a series of triumphs. Macaulay.
2. (Biol.) Any comprehensive group of animals or plants including several subordinate related groups.
☞ Sometimes a series includes several classes; sometimes only orders or families; in other cases only species.
3. (Math.) An indefinite number of terms succeeding one another, each of which is derived from one or more of the preceding by a fixed law, called the law of the series; as, an arithmetical series; a geometrical series.