open

adjective:allowing access, passage, or a view through an empty space; not closed or blocked
- Please leave the door open for some fresh air.
adjective:not sealed, fastened, or restricted; accessible or available
- The store is open from 9 AM to 6 PM.
adjective:frank, honest, and not secretive
- She was very open about her feelings.
adjective:undecided or subject to further change
- The question is still open for discussion.
verb:to move or adjust something so as to leave a space allowing access
- Do you mind if I open the window?
verb:to begin or inaugurate an event, activity, or operation
- The mayor will open the new community center next week.
verb:to make available or accessible
- The company plans to open a new branch in the city.
verb:to spread out or unfold
- He opened the map on the table to study the route.
noun:an undeveloped or public area of land, especially one without fences or obstructions
- The children ran freely across the open.