get/keep somebody onside

get (someone) onside

To gain someone's support or approval. If we can get the CEO onside, it would definitely help us to further this initiative.
See also: get, onside

keep (someone) onside

To maintain someone's support or approval. If we want to expand our initiative, then we definitely need to keep the CEO onside.
See also: keep, onside

get/keep somebody onˈside

get/keep somebody’s support: The government needs to keep the major national newspapers onside to help win votes in the election.
See also: get, keep, onside, somebody