"belonging to or serving as a preface, introductory," 1670s, from Latin praefat-, past-participle stem of praefari "to say beforehand" (see preface (n.)) + -ory. Related: Prefatorial; prefatorily.
pre-existence
pre-existing
prefab
prefabricate
preface
prefatory
prefect
prefectural
prefecture
prefer
preferable