A reservoir which stores water to maintain the level in a canal.

An intraventricular catheter system consisting of a catheter in one lateral ventricle attached to a reservoir implanted under the scalp, used for the aspiration of cerebrospinal fluid or for the delivery of drugs.

(humorous) Au revoir.

A container, such as a pressurised tank, for holding compressed air.

A framework for computation derived from recurrent neural network theory, mapping input signals into higher-dimensional computational spaces through the dynamics of a fixed, non-linear system called a reservoir.