descend on (something)(redirected from descended on)
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descend on (something)
1. Literally, to drop onto someone or something. No one was too pleased when rain began to descend on our picnic.
2. By extension, to reach a particular place or thing in great numbers. The kids descended on the birthday cake as soon as I set it down. People have descended on our town to attend that big software conference.
descend (up)on someone or something
1. . Lit. [for something] to come down or fall upon someone or something. Flakes of fluffy snow descended upon the gentle slopes.
2. . Fig. [for people] to arrive or come to someone or something in great numbers. The petitioners descended upon the mayor's office in droves.