What does the letter 'P' stand for in NPST, which finds mention in NEP 2020?

In NPST the letter P stands for Professional, in National Professional Standards for Teachers.

Primary does not represent that letter in the expansion.

Public is not the word denoted here.

Probation does not fit the full form.

The standards will define the expected role, competencies and career pathway of teachers at every stage.

They are to be prepared by the National Council for Teacher Education as a standard-setting reference.