set a precedent

1. Establish a usage, tradition, or standard to be followed in the future. For example, He set a precedent by having the chaplain lead the academic procession. The word precedent here signifies a previous instance or legal decision upon which future instances are based, a usage dating from the early 1400s. In British and American law it more specifically refers to a legal decision that may be used as a standard in subsequent cases.

Example Sentences

Mr Kurland, who is not involved with their case, told the BBC that allowing entry to the family could set a precedent for others in ICE detention with ties to Canada.

From BBC

The Home Office has braced itself for a wave of legal challenges from other councils over the use of hotels in their areas, fearing Epping's victory would set a precedent.

From BBC

He fears that the approval of a commercial project in the residential area will set a precedent that could mark the start of a larger development push.

From Los Angeles Times

The hope – though perhaps not the expectation – is that Tuesday's judgement doesn't set a precedent.

From BBC

"If they want to set a precedent, let them give us reasons why the current president should not go near the casket. And who has told them that he wants to be near the casket, anyway?" he told the state broadcaster ZNBC.

From BBC