Measure for Measure is a play written by William Shakespeare in 1604 or 1605. This comedy is often called a "problem" play.
The title comes from the Bible, Matthew 7:2:
For in the same way you judge others, you will be judged, and with the measure you use, it will be measured to you.
... it refers to an adherent of a monarch or royal family.
Of the more specific uses of the term, the most common include:
1. A supporter of King Charles I of ...