approaching a particular destination; a coming closer; a narrowing of a gap; "the ship's rapid rate of closing gave them little time to avoid a collision"
final or ending; "the closing stages of the election"; "the closing weeks of the year"; "the closing scene of the film"; "closing remarks"
near or close to but not necessarily touching; "lands adjacent to the mountains"; "New York and adjacent cities"
nearest in space or position; immediately adjoining without intervening space; "had adjacent rooms"; "in the next room"; "the person sitting next to me"; "our rooms were side by side"
an obstruction that stands in the way (and must be removed or surmounted or circumvented)
something immaterial that stands in the way and must be circumvented or surmounted; "lack of imagination is an obstacle to one's advancement"; "the poverty of a district is an obstacle to good education"; "the filibuster was a major obstruction to the success of their plan"