Redundancy or redundant may refer to:

Look up redundancy or redundant in Wiktionary, the free dictionary.

• Redundancy (linguistics), information that is expressed more than once

• Data redundancy, database systems which have a field that is repeated in two or more tables
• Logic redundancy, a digital gate network containing circuitry that does not affect the static logic function
• Redundancy (engineering), the duplication of critical components or functions of a system with the intention of increasing reliability
• Redundancy (information theory), the number of bits used to transmit a message minus the number of bits of actual information in the message
• Redundancy in total quality management, quality which exceeds the required quality level, creating unnecessarily high costs
• The same task executed by several different methods in a user interface

• Codon redundancy, the redundancy of the genetic code exhibited as the multiplicity of three-codon combinations
• Cytokine redundancy, a term in immunology referring to the phenomenon in which, and the ability of, multiple cytokines to exert similar actions
• Gene redundancy, the existence of several genes in the genome of an organism that perform the same role to some extent

• "Redundant" (song), 1997 song by American rock band Green Day
• Redundant (play), 2001 drama by Leo Butler

• Redundant church, no longer used for worship
• Redundancy in United Kingdom law, dismissal for economic reasons

• All pages with titles beginning with Redundant
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• Voluntary redundancy, termination of employment by agreement between employee and employer

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