<H1>precedent
Main Entry: 2prec·e·dent
Pronunciation: \ˈpre-sə-dənt\ Function: noun Date: 15th century 1: an earlier occurrence of something similar2 a: something done or said that may serve as an example or rule to authorize or justify a subsequent act of the same or an analogous kind <a verdict that had no precedent> b: the convention established by such a precedent or by long practice3: a person or thing that serves as a model
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precedence
Main Entry: pre·ce·dence

Pronunciation: \ˈpre-sə-dən(t)s, pri-ˈsē-dən(t)s\ Function:
noun Date: 1588 1 a
obsolete : antecedent b
: the fact of
preceding in time2 a
: the right to superior honor on a ceremonial or formal occasion b
: the order of ceremonial or formal preference c
: priority of importance <your safety takes
precedence>