(mathematics) The branch of mathematics dealing with the real numbers and related structures.

A used book, one which may include physical wear, highlighting or marginalia and hence lacks value as a collectible, but which remains in sufficiently good condition to be suitable for someone whose primary interest is in reading the book.

A person who is able to sightread.

US standard spelling of reactive armour.

Vehicle armor which reacts to the impact of a weapon in such a way as to reduce the damage done, typically by exploding to disrupt the penetrating jet of a shaped-charge weapon.

In a realistic manner.

The information, usually a measurement, displayed on a graduated scale. / (computing) The information output from a computer in a readable form.

(transitive, idiomatic) To read something and say the words to inform other people. / (transitive, idiomatic, US) (of a device) To read some data and inform the person using the device.

A display, particularly one that presents numerical data. / An account of the topics discussed in a meeting, especially in diplomatic or political contexts.

the state resulting from such a reaction / a process involving change in atomic nuclei