the way that things have always been done
earlier decision,case,event,etc. that is regarded as an example or rule for what comes later
"common law originated in the unwritten laws of England and was later applied in the United States"
The execution of Mary Queen of Scots..set a precedent for sitting in judgment on the Lord's Anointed.
出自: C. Hill
He had no precedent for this work..but had to invent the rules for it.
出自: P. Gay