All the main English dictionaries give the following as the primary meaning of mundane: Its original meaning appears as the second and less common usage. Mundane meaning secular, and worldly is derived from Latin mundamus which carried the same definition. Etymonline does not mention its more recent meaning as dull, boring, while Ngram shows a considerable increase in the usage of the term from the 1950s. What is the primary meaning of the word 'mundane' according to the main English dictionaries?
1) Secular and worldly
2) Dull and boring
3) Common and popular
4) Original and ancient