"Application under consideration" usually means they are reviewing your information to see if you would be a good candidate for the job. ... Application under considration means just that. HR is looking at other canidates and if they are really interested in you they are checking reffrences.

What does still under consideration mean?

“under consideration/active” means that they are still going through interviews and you as an applicant is still under consideration and your requisition is still active. After 12 business days I would reach out to the recruiter for a current status on the selection process for the position.

Does under consideration mean shortlisted?

You get marked as under consideration when employers are interested (shortlist) your profile. It doesn't mean that you'll be called in for audition, it doesn't mean you'll get the job. But it usually means you are under consideration.