(idiomatic) Middle of the night.

(idiomatic) To provide happiness, to bring a deeply-felt contentment.

(uncountable, law) The legal authorisation of one person to act as the agent of another. / (countable, law) A legal document allowing one person to act as the agent of another.

present participle of goof off

(rare, dated) The centre of mass.

(mathematics) A surface formed when a given curve is revolved around a given axis. If the resulting surface is a closed one, it also defines a solid of revolution.

Used other than figuratively or idiomatically: see off, rail. / (idiomatic) In an abnormal manner, especially in a manner that causes damage or malfunctioning / (idiomatic) Insane.

(law) In many legal systems, the highest-level court of appeal in procedural matters, which is asked to squash a verdict but then refers the case back for a new court case at the previous level.

(mathematics, physics) A point, near, or within a body at which the object's mass can be assumed to be concentrated; it coincides with the centroid for a body of uniform density, and with the centre of gravity in a uniform gravitational field.

(geometry) Any of one or more lines about which a geometric figure is symmetric