noun
authorized absence; excused absence from class
Abbreviation of 公認欠席. Used mainly in school contexts for an absence officially permitted by the institution, such as for a school event or illness.
See also: 公認欠席
インフルエンザで公欠になった。
I got an excused absence because of the flu.
公欠届を提出してください。
Please submit the authorized absence form.