Applying, Retrograde
When the applying body is in retrograde motion. (v. Motion.) Some authorities have used the term ‘approach’ as synonymous with ‘apply’. The faster-moving body is said to be applying to an aspect of the slower-moving one. Precision in this regard might indcate, for example, that Saturn in direct motion could be applying to an aspect of Uranus, Neptune or Pluto only. Aspects are more powerful when forming than when separating. If either planet be retrograde, the influence is said to be injurious, or the promised result so subject to delay that it is of little value when it materializes.
DeVore, Nicholas. Encyclopedia of Astrology. New York: Philosophical Library, 1947.