noun The part of something that faces out; the outer surface.
He's repainting the outside of his house.
noun The external appearance of someone or something.
Her outside was stern, but inside was a heart of gold.
noun The space beyond some limit or boundary.
Viewed from the outside, the building seemed unremarkable.
noun The furthest limit, as to number, quantity, extent, etc.
It may last a week at the outside.
noun The part of a road towards the central division: towards the right if one drives on the left, or towards the left if one drives on the right.
On a motorway, you should always overtake other vehicles on the outside.
noun The side of a curved road, racetrack etc. that has the longer arc length; the side of a racetrack furthest from the interior of the course or some other point of reference.
On the final bend, the second-place car tried to go around the outside of the leader but spun off into the barrier.
noun The outer part of the sea, away from the peak of a wave.
noun A passenger riding on the outside of a coach or carriage.