Having much distance from one terminating point on an object or an area to another terminating point (usually applies to horizontal dimensions; see Usage Notes below).
It's a long way from the Earth to the Moon.
Having great duration.
The pyramids of Egypt have been around for a long time.
Seemingly lasting a lot of time, because it is boring or tedious or tiring.
Not short; tall.
Possessing or owning stocks, bonds, commodities or other financial instruments with the aim of benefiting of the expected rise in their value.
I'm long in DuPont; I have a long position in DuPont.
Of a fielding position, close to the boundary (or closer to the boundary than the equivalent short position).
(of a ball or a shot) Landing beyond the baseline, and therefore deemed to be out.
That forehand is long.
Occurring or coming after an extended interval; distant in time; far away.
One who longs or yearns for something.