In the transmission of information, the fraction of the gross information content of a message which can be eliminated without loss of essential information.

Any deliberate duplication or partial duplication of circuitry or information to decrease the probability of a system or communication failure.

1. Repetition of a specified deoxyribonucleic acid sequence in a nucleus.

2. Multiplicity of codons for individual amino acids.

A repetitive statement.

A statically indeterminate structure.