A long vowel.
A long syllable.
A note formerly used in music, one half the length of a large, twice that of a breve.
A long integer variable, twice the size of an int, two or four times the size of a short, and half of a long long.
An entity with a long position in an asset.
Every uptick made the longs cheer.
A long-term investment.
The long summer vacation at the English universities.
To take a long position in.
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.
To be appropriate to, to pertain or belong to.
On account of, because of.
Longitude
To belong.