pupil pupil /ˈpjuːpəl/

noun

1. () A learner who is enrolled in an educational institution  ( educatee , pupil , student )
   a learner who is enrolled in an educational institution
    The pupils were all eagerly waiting for the teacher to start the lesson
   The pupils were all eagerly waiting for the teacher to start the lesson
   
   
2. () The contractile aperture in the center of the iris of the eye; resembles a large black dot  ( pupil )
   the contractile aperture in the center of the iris of the eye; resembles a large black dot
    The pupil is the black center of the eye that regulates the amount of light that enters
   The pupil is the black center of the eye that regulates the amount of light that enters
   
   
3. A young person attending school (up through senior high school)  ( pupil , school-age child , schoolchild , schoolie [Informal, Australian] , schoolkid [Informal] )
   a young person attending school (up through senior high school)