Ap"pulse [L. appulsus, fr. appellere, appulsum, to drive to; ad + pellere to drive: cf. F. appulse.]
1.
A driving or running towards; approach; impulse; also, the act of striking against.
In all consonants there is an appulse of the organs.
Holder.
2. Astron.
The near approach of one heavenly body to another, or to the meridian; a coming into conjunction; as, the appulse of the moon to a star, or of a star to the meridian.
© Webster 1913.