factionary adjective 1noun 1forms 1 adjective1 •(no longer used) Belonging to a faction; partisan; taking sides.Prithee, fellow, remember my name is Menenius, always factionary on the party of your general. — 1608 noun1 •A member of a faction.[…] the traitor Ursel, some of them suppose, is dead, but if it were so, his name is sufficient to draw together his old factionaries […] — 1832 formsfactionaries
