Definitions
1.NounA cocktail made from a spirit plus soda water etc.
2.NounAn all clear or full speed ahead signal.
3.NounA very high bouldering problem, often with a hard landing.
4.NounClipping of highball glass, a tall glass tumbler used for serving highballs.
5.VerbTo make an estimate which tends toward exaggeration."If we highball the price, it comes out to $240. If we lowball it, it's closer to $200."
6.VerbTo move quickly; to hightail.