children take the roles of physician or patient or nurse and pretend they are at the physician's office; "the children explored each other's bodies by playing the game of doctor"
a licensed medical practitioner; "I felt so bad I went to see my doctor"
a person who holds Ph.D. degree (or the equivalent) from an academic institution; "she is a doctor of philosophy in physics"
engaged in as a pastime; "an amateur painter"; "gained valuable experience in amateur theatricals"; "recreational golfers"; "reading matter that is both recreational and mentally stimulating"; "unpaid extras in the documentary"