: a dark shape that appears on a surface when someone or something moves between the surface and a source of light
: an area of darkness created when a source of light is blocked
: a very small amount of something
: to cover (something) with a shadow
: to follow and watch (someone) especially in a secret way
: to follow and watch (someone who is doing a job) in order to learn how to do the job yourself
—used to describe the members of the main opposition party in British politics who would be given important positions in the government if their party won a national election
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