Codon is said to be degenerate when same amino acid is specified by more than one codons, eg, Alanine is coded by 4 codons, cysteine by 2 , leucine by 6, lysine by 2 etc.
The other properties of genetic code are
(i) The code is triplet
(ii) Code is non-overlapping
(iii) Code is commaless
(iv) Code is non-ambiguous (particular codon will always code for same amino acid)
(v) Code is universal.