0 to replace something, especially something older or more old-fashioned:
Most of the old road has been superseded by the great interstate highways.
1 to replace something older, less effective, or less important or official:
2 if a law, rule, agreement, etc. supersedes another, it replaces it:
The newly signed deal supersedes the current contract and runs to the end of 2012.
be superseded by sth It is important to ascertain that the documents in your possession have not been superseded by new laws.
supersede a law/regulation/sb's authority If the Bill is passed, it will supersede the Fed's authority.
3 if a process, system, or product supersedes another, it replaces it because it is more modern or becomes more popular:
The internet seems to have superseded every mode of communication ever invented!
be superseded by sth Phones using 2.5G technology were superseded by third-generation (3G) phones.
Should they insist that workers have an "affirmative" right to better work conditions, a right that superseded their employers' freedom to contract?
He defines the heterogeneous products as interventionist products that protect defined interests and/or supersede voluntary transactions.
I would expect over time a common theory of operational semantics to emerge which would supersede much of the contents of the book.
Issues of cost-containment are reality, but they should not supersede the requirement of justice to protect all patients from disease.
The network of these places extends as modern technological society dominates our daily life, pushing aside and superseding places with an emotional and symbolic significance.
Today, however, the variable target function method has been superseded largely by the more efficient torsion angle dynamics algorithm.
It has now been superseded by other collections of data,19 but this does not diminish its earlier importance.
The new approach accepts this awareness and is presented at superseding earlier approaches examining, for example, specific sensory pathways.
