\Public school\
(a) In Great Britain, any of various schools maintained by
    the community, wholly or partly under public control, or
    maintained largely by endowment and not carried on
    chiefly for profit; specif., and commonly, any of various
    select and usually expensive endowed schools which give a
    liberal modern education or prepare pupils for the
    universities. Eton, Harrow, Rugby, and Winchester are of
    this class.
(b) In the United States, a free primary, grammar, or high
    school maintained by the local government.