Temporal means to do with time, or with worldly rather than sacred things. Temporal order, temporal power, the temporal lobe.
The two senses look unrelated and share a Latin root about time and this world. Temporal power meant the pope's rule over territory, as against spiritual authority. The temporal lobe of the brain is named from the temples of the head, a third and separate word.
1adjectivetemporalTo do with time, or with worldly rather than sacred things.
“The novel's temporal jumps, from childhood to old age and back, confused some readers.”
temporal is a quality.
Latin temporalis comes from tempus, time. The worldly sense grew from meaning belonging to this passing life.
Proto-Indo-European
*temh₁-
Latin
temporālis — of time (in grammar), temporary, relating to time as opposed to eternity
Old French
temporel
Middle English
temporal, temporel — transitory, worldly, material, of secular society
English, today
temporal
From Middle English temporal, temporel (“transitory, worldly, material, of secular society”), from Old French temporel or Latin temporālis (“of time (in grammar), temporary, relating to time as opposed to eternity”), from tempus + -ālis.
Etymology from Wiktionary, CC BY-SA