move downward and lower, but not necessarily all the way; "The temperature is going down"; "The barometer is falling"; "The curtain fell on the diva"; "Her hand went up and then fell again"
be defeated; "If America goes down, the free world will go down, too"
be ingested; "This wine sure goes down well"; "The food wouldn't go down"
go under, "The raft sank and its occupants drowned"
disappear beyond the horizon; "the sun sets early these days"