Synonyms of 'in motion'
▷ See motion
1 in progressDictionary, going on, under way
His job begins in earnest now that the World Cup is in motion.
2 movingDictionary, going, working
Always stay seated while a bus is in motion.
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If you say that a plan or scheme is afoot, it is already happening or being planned, but you do not know much about it.
We all knew that something awful was afoot.
Thesaurus for in motion from the Collins English Thesaurus
If a process or event is in motion , it is happening . If it is set in motion , it is happening or beginning to happen .