shadowing

The effect of being shadowed (in the sense of blocked), as from a light source or radio transmission.

The situation where a person repeats speech immediately as they hear it (usually through earphones).

Secretly or discreetly tracking or following someone, keeping under surveillance.

A faint representation; an adumbration.

There are […] in savage theology shadowings, quaint or majestic, of the conception of a Supreme Deity.

The technique of copying ROM contents to RAM to allow for shorter access times. The ROM chip is then disabled while the initialized memory locations are switched in on the same block of addresses.