A formal agreement, contract, rule, or pact.
A treaty or supplement to such.
A meeting or gathering.
A practice or procedure widely observed in a group, especially to facilitate social interaction; a custom.
The convening of a formal meeting.
A formal deliberative assembly of mandated delegates.
The quality of being eccentric or odd; any eccentric behaviour.
The ratio, constant for any particular conic section, of the distance of a point from the focus to its distance from the directrix.
The eccentricity of the conic section (usually an ellipse) defined by the orbit of a given object around a reference object (such as that of a planet around the sun).