Education in a structured environment explicitly designed to teach students, usually in classrooms with certified teachers.

(aviation) An aerial salute to commemorate a deceased person, consisting of a formation of flying aircraft with a space where one plane should be flying.

(geography, historical) A contemporary designation for the USSR, a state that existed from 1922 to 1991.

Synonym of former USSR

(Oxbridge) A formal meal held in a college hall, generally with a grace, waiting staff and a set menu with multiple courses; usually held once or twice per week.

plural of formal hall

(Cambridge University slang) A social meal between two university societies (a swap) held at a formal hall; generally less associated with drinking games and rowdy behaviour.

plural of formal swap

(organic chemistry) An organic compound with chemical formula C₂H₄N₂, obtainable from formaldehyde by the addition of hydrazine.

plural of format string