The passage of a celestial body across the upper or lower meridians. Broadly speaking it refers to the travel over a given period, of that body. Interpretation of a horoscope by relating the position of the planets today, or for a particular time span to the position of the planets in the birth or mundane chart. Thus transits deal with actual or objective time. In interpretation, they represent the external pressures or forces that act upon one, events and situations that are encountered, etc.