descend upon

present singular third person descends upon · participle present descending upon · participle past descended upon · past descended upon · alternative descend on

1. To arrive, usually without warning or invitation.
   1. To make an attack or incursion, from or as if from a vantage ground; to come suddenly and with violence.
   2. To arrive suddenly or unexpectedly, especially in a manner that causes disruption or inconvenience.

      My neighbour descended upon me just as I was walking out the door.

2. To visit in large numbers, especially a public place.

   This fall, millions of devout Muslims will descend upon Mecca, Medina, and Saudi Arabia's holy sites in one of the largest annual migrations in human history.

   2013, Laurie Gaarrett, Maxine Builder, The Middle East Plague Goes Global