Referring to a perspective or view from the real world, in contrast to a perspective from within the fictional world.

plural of clockwork universe

(philosophy, metaphysics) A universe in which all of the actions of matter and energy operate as reactions according to predetermined rules set down by a creator, like the movements of a clock.

A measure of time that conforms, within a close approximation, to the mean diurnal rotation of the Earth and serves as the basis of civil timekeeping.

A religion which encourages theological liberalism and an individual search for truth and the adherents of which draw on many different theological sources and have a wide range of beliefs and practices.

plural of risk universe

(uncountable) A branch of mathematics dealing with equational classes of algebras, where similar theorems from disparate branches of algebra are unified.

A coupling that allows different parts of a machine not in line with each other some freedom of movement at the same time as transmitting rotary motion.

plural of universal donor

(medicine) A person with blood type O, which lacks antigens and is therefore compatible with all other blood types, allowing them to donate blood to any other person.