Definitions from Wiktionary ( )

▸ noun:  A dark image projected onto a surface where light (or other radiation) is blocked by the shade of an object.
▸ noun:  Relative darkness, especially as caused by the interruption of light; gloom; obscurity.
▸ noun:  An area protected by an obstacle (likened to an object blocking out sunlight).
▸ noun:  (obsolete or poetic) A reflected image, as in a mirror or in water.
▸ noun:  (figurative) That which looms as though a shadow.
▸ noun:  A small degree; a shade.
▸ noun:  An imperfect and faint representation.
▸ noun:  (UK, law enforcement) A trainee, assigned to work with an experienced officer.
▸ noun:  One who secretly or furtively follows another.
▸ noun:  An inseparable companion.
▸ noun:  (typography) A drop shadow effect applied to lettering in word processors etc.
▸ noun:  An influence, especially a pervasive or a negative one.
▸ noun:  A spirit; a ghost; a shade.
▸ noun:  (obsolete, Latinism) An uninvited guest accompanying one who was invited.
▸ noun:  (Jungian psychology) An unconscious aspect of the personality.
▸ adjective:  Unofficial, informal, unauthorized, but acting as though it were.
▸ adjective:  Having power or influence, but not widely known or recognized.
▸ adjective:  (Commonwealth, politics) Part of, or related to, the opposition in government.
▸ adjective:  (US, politics) Acting in a leadership role before being formally recognized.
▸ verb:  (transitive) To shade, cloud, or darken.
▸ verb:  (transitive) To block light or radio transmission from.
▸ verb:  (particularly espionage) To secretly or discreetly track or follow another, to keep under surveillance.
▸ verb:  (transitive) To represent faintly and imperfectly.
▸ verb:  (transitive) To hide; to conceal.
▸ verb:  (transitive) To accompany (a professional) during the working day, so as to learn about an occupation one intends to take up.
▸ verb:  (transitive, programming) To make (an identifier, usually a variable) inaccessible by declaring another of the same name within the scope of the first.
▸ verb:  (transitive, computing) To apply the shadowing process to (the contents of ROM).
▸ noun:  A surname.

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