0 a member of a political group who joins another party or group with the intention, often secret, of changing its principles and plans:
1 involving the process or policy of members of a political group joining another party or group with the intention, often secret, of changing its principles and plans:
She should not be seen as an entryist, but as proof that allegiance no longer matters.
I thought that he might be some kind of right-wing entryist.
An entryist targeted the group, and the leadership mounted a strong campaign on his behalf.
They tried to work their entryist charms on the direct action movement.
Their moderation was a mask for entryist tactics.
They are acting almost as an entryist organization, placing people within the political parties.
