(1):

(n.) The act of moving forward; a proceeding in a course; motion onward.

(2):

(n.) Regular or proportional advance in increase or decrease of numbers; continued proportion, arithmetical, geometrical, or harmonic.

(3):

(n.) Course; passage; lapse or process of time.

(4):

(n.) 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.