A dress, especially a woman's or girl's dress; historically, a long outer garment worn by men or clergy.
From Middle English 'frock,' possibly from Old Norse 'frokk' or related Germanic words. Originally referred to a monk's garment, then extended to other clothing.
The 'frock coat' was so standard for male formal wear in the 1800s that it defined a gentleman—wearing one meant you had status, which is why Charles Darwin never appeared publicly without his.
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