define "procedural abstraction"

Abstraction hides or encapsulates the details of how something works.

A procedure is a group of instructions, also known as functions.

Procedural abstraction groups instructions into a procedure that encapsulates the combined work done, allowing that procedure to be used without knowing its inner workings.

Simple computer science glossary
In my experience, comprehension is achieved through clarity of thinking. This glossary is an ongoing project to clarify my thinking by defining computer science concepts in simple language.