n The state of being redundant; a superfluity; something redundant or excessive; a needless repetition in language; excessive wordiness.
n duplication | Duplication of components or circuits to provide survival of the total system in case of failure of single components.
n (chiefly|UK|Australia|New Zealand) The state of being unemployed because one's job is no longer necessary; the dismissal of such an employee; a layoff.
n (legal) surplusage inserted in a pleading which may be rejected by the court without impairing the validity of what remains.