Definitions
1.nounA long vowel.
2.nounA long syllable.
3.nounA note formerly used in music, one half the length of a large, twice that of a breve.
4.nounA long integer variable, twice the size of an int, two or four times the size of a short, and half of a long long.
5.nounAn entity with a long position in an asset."Every uptick made the longs cheer."
6.nounA long-term investment.
7.nounThe long summer vacation at the English universities.
8.verbTo take a long position in.
9.adjectiveHaving 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."
10.adjectiveHaving great duration."The pyramids of Egypt have been around for a long time."
11.adjectiveSeemingly lasting a lot of time, because it is boring or tedious or tiring.
12.adjectiveNot short; tall.
13.adjectivePossessing 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."
14.adjectiveOf a fielding position, close to the boundary (or closer to the boundary than the equivalent short position).
15.adjective(of a ball or a shot) Landing beyond the baseline, and therefore deemed to be out."That forehand is long."
16.adjectiveOccurring or coming after an extended interval; distant in time; far away.