Definition of appulse
1 : a driving or running toward something (such as a place) : act of striking against something (such as a point) the days have passed when national differences could be settled by the appulse of small professional armies — R. S. Ellery
2 : the apparent very near approach of one celestial body to another : a coming into conjunction — see lunar appulse
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Origin and Etymology of appulse
Latin appulsus driving forward, approach, from appulsus, past participle of appellere to drive toward, strike against, from ad- + pellere to drive, beat, push
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