set in train

To start (a sequence of events); to set in motion. Making this announcement will set in train a series of actions that we will not be able to stop, so please consider it carefully.

See also: set, train

See also:

set (something) out
set out
be (all) set to (do something)
get (all) set
get set
set (one's) hand to
set your hand to
set about
set about (doing something)
set about doing

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