(cricket) an administrative official who decides on any penalties for bad conduct etc

(physics) A frame of reference that is stationary relative to a body moving at constant velocity and on which no force is being exerted.

A set of assumptions, ideas and standards that form a viewpoint from which philosophical, religious and other ideas may be evaluated.

(intransitive, of light) To change direction as a result of entering a different medium / (transitive, optics) To cause (light) to change direction as a result of entering a different medium.

An improvement (or an intended improvement) in the existing form or condition of institutions or practices, etc.; intended to make a striking change for the better in social, political or religious affairs or in the conduct of persons or operation of organizations.

A response, to a stimulus, that has been acquired by operant conditioning.

a reflex in infants in which the head is turned towards any stimulus; used to find the nipple

An automatic response to a simple stimulus which does not require mental processing. / (linguistics) The descendant of an earlier language element, such as a word or phoneme, in a daughter language.

Bent, turned back or reflected. / Produced automatically by a stimulus. / (geometry, of an angle) Having greater than 180 degrees but less than 360 degrees.

(transitive) To bend back or turn back over itself. / (transitive, obsolete) To reflect (light, sight, etc.). / (transitive, obsolete) To reflect or mirror (an object), to show the image of.