sectionary noun 2adjective 1forms 1 noun2 •(historical) A member of a French antiroyalist political party that was one of the driving forces of the French Revolution.Every indigent citizen was allowed forty sous a day, to enable him to be present at the sectionary meetings. — 1856 •(historical) A member or supporter of the sectionary party. adjective1 •(historical) Pertaining to the sectionary party.Any explanation for the triumph of the 'federalist' or sectionary movement at Toulon must, therefore, begin by examining the profound isolation of the incumbent Jacobin administration. — 1991 formssectionaries