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"
corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones; "adulterate liquor"
an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)