APPULSE, in astronomy, the approach of any planet to a conjunction with the sun, or a star. It is a step towards a transit, occultation, conjunction, eclipse, &c. M. Flamsted, M. de la Hire, and others, have given observations of the moon's appulses to the pleiades. Phil. Trans. N. 76. p. 361. M. Acad. Science. an. 1708.