PROGRESSIONS
Noun
progressions
plural of progression
Source: Wiktionary
PROGRESSION
Pro*gres"sion, n. Etym: [L. progressio: cf. F. progression.]
1. The act of moving forward; a proceeding in a course; motion
onward.
2. 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.
3. (Math.)
Definition: Regular or proportional advance in increase or decrease of
numbers; continued proportion, arithmetical, geometrical, or
harmonic.
4. (Mus.)
Definition: 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