Red Hats

noun
1.
the original sect of Tibetan Buddhist monks, whose doctrines were much influenced by the earlier Bön religion.
Compare Yellow Hats.

red hat

noun
1.
the broad-brimmed official hat of a Roman Catholic cardinal, symbolic of the office or rank of a cardinal.
2.
a cardinal.
Also called scarlet hat.
Origin
1590-1600
British Dictionary definitions for Red Hats

red hat

noun
1.
the broad-brimmed crimson hat given to cardinals as the symbol of their rank and office
2.
the rank and office of a cardinal