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.
To await, aspire, desire greatly (something to occur or to be true)
She longed for him to come back.
To be appropriate to, to pertain or belong to.
Longitude
To belong.
Long trousers/pants, as opposed to shorts.