cut-ting of light
Phonetic: /ˈkʌt.ɪŋ əv laɪt/
In Medieval astrology, cutting of light refers to the interruption or blockage of planetary influence before an aspect can perfect.
This condition occurs when another planet intervenes between applying significators or when planetary motion prevents the completion of an expected connection. Medieval astrologers interpreted the cutting of light as obstruction, interference, delay, or prevention of a matter from reaching fulfillment. The doctrine was especially important in horary astrology when judging whether agreements, meetings, or desired outcomes would successfully occur. The severity of the interruption depended on the condition and dignity of the planets involved.