Adoption of statute

What does Adoption of statute mean in American Law?

The definition of Adoption of statute in the law of the United States, as defined by the lexicographer Arthur Leff in his legal dictionary is:

This may once have referred only to the legislative portion of the process of enactment of a statute, i.e., the portion prior to the executive’s role, but it is now also used synonymously with enactment. Hence, “date of adoption,” when said of a statute, ordinarily refers to the date upon which the whole process was completed and the statute became law.