حكمه: إذا أريد أحد معانيه لا يراد معناه الآخر.
Its rule is that when one of its meanings is intended, the other meaning is not intended in that occurrence.
A plurality of available lexical senses is not identical to simultaneously intending them all. Thus if al-qurʾ is used in the sense of menstruation in a particular legal interpretation, purity is not also taken as the intended sense of that occurrence. This is the position presented by this concise text.