Meetings, as used in this Article shall mean all regular, special, or called meetings, formal or informal, of a public body for the purposes of briefing, discussion of public business, formation of tentative policy, or the taking of any action. (Ref. 84-1409(2) RS Neb.) (Amended by Ord. Nos. 183, 1/4/77; 255, 11/1/83)