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WordReference Random House Unabridged Dictionary of American English © 2024harmon′ic se′ries, [Math.]- Mathematicsa series in which the reciprocals of the terms form an arithmetic progression.
- Mathematicsthe divergent infinite series, 1 + ½ + 1⁄3 + ¼ + 1⁄5 +. …
Collins Concise English Dictionary © HarperCollins Publishers:: harmonic series n - a series whose terms are in harmonic progression, as in 1 + + + …
- the series of tones with frequencies strictly related to one another and to the fundamental tone, as obtained by touching lightly the node points of a string while playing it. Its most important application is in the playing of brass instruments
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