1. <jargon> When several different identifiers refer to the same object. The term is very general and is used in many contexts.
See alias, aliasing bug, anti-aliasing.
2. <hardware> (Or "shadowing") Where a hardware device responds at multiple addresses because it only decodes a subset of the address lines, so different values on the other lines are ignored.
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Nearby terms: ALGY « ALIAS « alias « aliasing » aliasing bug » Alice » alife