a group or a number of related or similar things, events, etc., arranged or occurring in temporal, spatial, or other order or succession; sequence.

a number of games, contests, or sporting events, with the same participants, considered as a unit

The two baseball clubs played a five-game series.

a set, as of coins or stamps.

a set of successive volumes or issues of a periodical published in like form with similarity of subject or purpose.

Radio and Television .

a daily or weekly program with the same cast and format and a continuing story, as a soap opera, situation comedy, or drama.

a number of related programs having the same theme, cast, or format

a series of four programs on African wildlife.

Mathematics .

a sequence of terms combined by addition, as 1 + 1 / 2 + 1 / 4 + 1 / 8 + 1 / 2 n.

infinite series.

Rhetoric . a succession of coordinate sentence elements.

Geology . a division of stratified rocks that is of next higher rank to a stage and next lower rank to a system, comprising deposits formed during part of a geological epoch.

Electricity . an end-to-end arrangement of the components, as resistors, in a circuit so that the same current flows through each component. Compare parallel ( def. 13 ) .

Chemistry . a group of related chemical elements arranged in order of increasing atomic number

the lanthanide series.

Electricity . consisting of or having component parts connected in series

a series circuit; a series generator.

noun

disorder , disorganization

noun

alternation , arrangement , array , category , chain , classification , column , consecution , continuity , course , file , gradation , group , line , list , procession , progression , range , row , run , scale , sequel , sequence , set , skein , streak , string , suit , suite , tier , train , order , round , succession , continuation