What is the meaning of the word "long"?

Definitions:

(of speech sounds or syllables) of relatively long duration adjective
- the English vowel sounds in `bate', `beat', `bite', `boat', `boot' are long
for an extended time or at a distant time adverb
- a promotion long overdue
having or being more than normal or necessary:'long on brains' adjective
- in long supply
holding securities or commodities in expectation of a rise in prices adjective
- is long on coffee
involving substantial risk adjective
- long odds
of relatively great height adjective
- a race of long gaunt men Sherwood Anderson