noun an adjustable pattern used by tailors.
2. protractor ·noun one who, or that which, protracts, or causes protraction.
3. protractor ·noun a muscle which extends an organ or part;
opposed to retractor.
4. protractor ·noun an instrument formerly used in extracting foreign or offensive matter from a wound.
5. protractor ·noun a mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. it is of various forms, semicircular, rectangular, or circular.