open question

: having no enclosing or confining barrier : accessible on all or nearly all sides

: being in a position or adjustment to permit passage : not shut or locked

: having a barrier (such as a door) so adjusted as to allow passage

: to move (something, such as a door) from a closed position

: to make available for entry or passage by turning back (something, such as a barrier) or removing (something, such as a cover or an obstruction)

: to make available for or active in a regular function

: opening

: open and unobstructed space: such as

: open air

: an interrogative expression often used to test knowledge

: an interrogative sentence or clause

: a subject or aspect in dispute or open for discussion : issue

: to ask a question of or about

: to interrogate intensively : cross-examine

: doubt, dispute