traditional= enter college at ~18, graduate at ~22, enter medical school
non traditional =ages significantly different. Could be a career change or something along those lines.
Kind of a gray area at least from my perspective are those who intentionally take 1-2 years off but always had medical school in mind. I would consider these "non trad" as they have more "life experience" than the typical traditional applicant would.
the buzzword for non traditional applicants is life experience haha.
trads usually have planned a journey to med school and therefore have all the extra curriculars, research, leadership experience, volunteering, blah blah blah.
non trads may have a lower gpa and less EC's because they didn't necessarily want to become a doctor when they were in college. They make up for this in gained life experience.