What is advanced professional practice?

Using the dictionary I found these definitions:
Advanced: -highly developed or complex
-at a higher level
-ahead of others
-far along in course or time
Professional: -relating to, or engaged in or suitable for a profession
-conforming to the standards of a professional
-engaged in a given activity as a source of livelihood or as a career
-performed by persons receiving pay
-having or showing great skill
in other words a 'skilled professional'
Practice: -to do or perform habitually or customarily; making a habit of
-to do or perform [something] repeatedly in order to acquire or polish a skill
-to give lessons or repeat instructions
-to work at - especially as a profession
-to carry out in action

So, drawing on the above dictionary definitions, I can define 'advanced professional practice' as:
'An action at a higher level, that is carried out by a professional practitioner, who has spent time developing specific skills and expertise in order to enhance their own practice'

In the case of careers work, this could be undertaking:
- a specialist role i.e. work with international students, employability
- a mentoring role to those staff who need a role model [perhaps new to the service, newly qualified]
- developmental/training roles to disseminate good practice i.e. regional training
- a "lead" role in the service i.e. guidance

Advanced professional practice should be a process of self development that enhances the quality of your work, drawing on best practice and research in the field