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
Examples from the web for red hat
  • With a red hat which doesn't go, and doesn't suit me.
  • She wore a red dress and a red hat to protect her eyes from the sun.
British Dictionary definitions for red hat

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
red hat in Technology
operating system
A distribution of Linux.
(https://redhat.com/).
(1996-12-21)