airs and graces
(logic) A set, whose elements are called nodes or worlds, together with a preordering relation for that set, called its accessibility relation.
(derogatory) Behaviour adopted (originally) to demonstrate one's good upbringing; or (now) one's superiority; pretentious or snobbish behaviour.
(pharmacology) Any drug having this property
(meteorology) A weather phenomenon where the polar vortex breaks down, causing a sudden temperature increase in the stratosphere of 50 kelvin or more.
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