- The definition of a tenet is a belief or principle that is held by a group as being true.
An example of tenet is the Christian belief that Jesus is the son of God.
tenet definition by Webster's New World
Origin: Classical Latin he holds ; from tenere: see tenant
tenet definition by American Heritage Dictionary
Origin: Probably from Medieval Latin, from Latin, third person sing. present indicative of tenēre, to hold; see ten- in Indo-European roots.