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. Regular or proportional advance in increase or decrease of numbers; continued proportion, arithmetical, geometrical, or harmonic.
4. 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
Geometrical progression, a progression in which the terms increase or decrease by equal ratios, as the numbers
-- Harmonic progression, a progression in which the terms are the reciprocals of quantities in arithmetical progression, as ½, ¼, ⅙, ⅛, ¹/₁₀.
Ar·ith·met·ic·al a. Of or pertaining to arithmetic; according to the rules or method of arithmetic.
Arithmetical complement of a logarithm. See Logarithm.
Arithmetical mean. See Mean.
Arithmetical progression. See Progression.
Arithmetical proportion. See Proportion.