Definition of long nine in US English:

long nine

noun

  • 1A relatively long-barrelled gun for firing nine-pound cannonballs or shells, formerly in naval use.

  • 2US. A kind of long, thin cigar of low cost. Now historical.

Origin

Late 18th century; earliest use found in Gazetteer & New Daily Advertiser. From long + nine.

Pronunciation

long nine

/ˌlɒŋ ˈnʌɪn/