noun, plural -ries, adjective | 1. | a group or a number of related or similar things, events, etc., arranged or occurring in temporal, spatial, or other order or succession; sequence. |
| 2. | 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. |
| 3. | a set, as of coins or stamps. |
| 4. | a set of successive volumes or issues of a periodical published in like form with similarity of subject or purpose. |
| 5. | Radio and Television.
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| 6. | Mathematics.
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| 7. | Rhetoric. a succession of coordinate sentence elements. |
| 8. | 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. |
| 9. | 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). |
| 10. | Chemistry. a group of related chemical elements arranged in order of increasing atomic number: the lanthanide series. |
| 11. | Electricity. consisting of or having component parts connected in series: a series circuit; a series generator. |

series se·ries (sēr'ēz)
n. pl. series
A number of objects or events arranged or coming one after the other in succession.
A group of objects related by linearly varying successive differences in form or configuration, as in a radioactive decay series.