n.

1. 前進
2. 連續
3. 發展；改進
4. 【數】級數
5. 【天】行星的順行

n.

1. gradual movement or development towards a destination or a more advanced state.
   ▸Music  a passage or movement from one note or chord to another.
2. a number of things in a series.
3. Astrology  a predictive technique in which the daily movement of the planets represents a year in the subject's life.