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progression

progression is defined in Webster's Unabridged Dictionary (1913) with 3 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.Course; passage; lapse or process of time. I hope, in a short progression, you will be wholly immerged in the delices and joys of religion. Evelyn.
  2. 2.(Math.) Regular or proportional advance in increase or decrease of numbers; continued proportion, arithmetical, geometrical, or harmonic.
  3. 3.(Mus.) A regular succession of tones or chords; the movement of the parts in harmony; the order of the modulations in a piece from key to key. Arithmetical progression, a progression in which the terms increase or decrease by equal differences, as the numbers 2, 4, 6, 8, 1010, 8, 6, 4, 2 -- Geometrical progression, a progression in which the terms increase or decrease by equal ratios, as the numbers 2, 4, 8, 16, 32, 6464, 32, 16, 8, 4, 2 -- Harmonic progression, a progression in which the terms are the reciprocals of quantities in arithmetical progression, as

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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